
Have you noticed red, flaky patches on your scalp or face when you’re stressed? You’re not alone. Studies show a strong link between stress and seborrheic dermatitis, a common skin condition.
Research found that 82% of patients say stress causes their flare-ups. Knowing what triggers it can help manage the condition better.
Key Takeaways
- Stress is a significant trigger for seborrheic dermatitis flare-ups.
- A majority of patients report stress as a primary trigger.
- Understanding the link between stress and seborrheic dermatitis is key for effective management.
- Recent studies support the connection between stress and the condition.
- Managing stress could be key to controlling seborrheic dermatitis symptoms.
What Is Seborrheic Dermatitis and Who Does It Affect?
Seborrheic dermatitis is a skin condition that causes inflammation. It leads to flaky skin, redness, and irritation. These symptoms mainly appear in areas with a lot of oil.
Definition and Clinical Characteristics
Seborrheic dermatitis is known for its redness, scaling, and sometimes crusting or weeping. It can be very uncomfortable, causing itching and irritation. The National Institutes of Health says it’s caused by a mix of factors, including Malassezia yeast overgrowth and sebum production.
Common Areas Affected by Seborrheic Dermatitis
The scalp, face, and chest are often hit by seborrheic dermatitis. The scalp can look like dandruff. On the face, it causes redness and flaky skin, mainly around the eyebrows and nose.
Prevalence and Demographic Patterns
Seborrheic dermatitis is common worldwide, with different rates in different groups. It’s more common in men and can strike at any age. People with Parkinson’s disease and weakened immune systems are also at risk.
Knowing about seborrheic dermatitis helps manage its symptoms. By understanding its signs and common spots, we can improve treatment and quality of life.
The Underlying Causes of Seborrheic Dermatitis

Seborrheic dermatitis is caused by many factors. Research has shown several key contributors. But the exact mechanisms are not fully understood.
The Role of Malassezia Yeast in Skin Inflammation
Malassezia yeast is found on human skin, mainly in oily areas. It plays a big role in seborrheic dermatitis by causing inflammation. Malassezia yeast feeds on sebum, breaking it down into fatty acids. These fatty acids can irritate the skin and cause inflammation.
This process weakens the skin’s natural barrier. It makes the skin more prone to irritation and infection.
“The presence of Malassezia yeast is not just a coincidence; it’s a key factor in the pathogenesis of seborrheic dermatitis,” as noted by dermatological research. The yeast’s metabolic activities contribute to the condition’s characteristic symptoms, such as redness, itching, and flaking.
Sebum Production and Skin Barrier Function
Sebum production is another critical factor in seborrheic dermatitis. Sebum is an oily substance produced by the sebaceous glands that helps to moisturize and protect the skin. But, an overproduction of sebum can create an ideal environment for Malassezia yeast to thrive, exacerbating the condition. Alterations in skin barrier function can also make the skin more vulnerable to the harmful effects of Malassezia and other irritants.
Genetic Predisposition and Family History
Genetic predisposition also plays a significant role in seborrheic dermatitis. Individuals with a family history of the condition are more likely to develop it themselves. Genetic factors can influence sebum production, skin barrier function, and the immune system’s response to Malassezia yeast. Understanding the genetic components can help in tailoring treatment and management strategies.
Immune System Factors
The immune system is key in responding to Malassezia yeast and other pathogens. In individuals with seborrheic dermatitis, the immune system may overreact or be unable to effectively manage the yeast’s presence, leading to inflammation and other symptoms. Modulating the immune response is a key aspect of treating seborrheic dermatitis.
By understanding these underlying causes, we can better approach the management and treatment of seborrheic dermatitis. Tailoring our strategies to address the specific factors at play in each individual case is important.
Common Triggers for Seborrheic Dermatitis Flares

Knowing what triggers seborrheic dermatitis flares is key to managing it. This condition causes skin inflammation, mainly in areas with lots of sebaceous glands. While we don’t know the exact cause, several factors can make symptoms worse.Seborrheic dermatitis flare-ups from stress are common. Use these proven stress relief techniques to calm your mind and clear your skin quickly.
Environmental Factors and Seasonal Changes
Environmental factors are big players in seborrheic dermatitis flares. Seasonal changes can impact the condition. Some people see their symptoms get worse in winter due to dry air. On the other hand, hot and humid weather can also cause flares.
Stress is another big trigger. Many patients say stress makes their condition worse. Stress can mess with the immune system and hormones.
Hormonal Fluctuations
Hormonal changes are a major trigger for seborrheic dermatitis flares. Changes in hormone levels, like androgens, can affect sebum production. This is common during puberty, menopause, or pregnancy.
Certain Medications and Health Conditions
Some medications and health conditions can also trigger flares. For example, medications that affect hormone levels or immune response can make symptoms worse. Conditions like Parkinson’s disease, HIV/AIDS, and other immune system disorders are linked to seborrheic dermatitis.
Dietary Influences
Diet can also play a role in seborrheic dermatitis, though the evidence is mostly based on personal experiences. Some people find that certain foods, like dairy products, gluten, and yeast, trigger or worsen their symptoms. Making dietary changes can help some people manage their condition, but it’s important to ensure these changes are balanced and nutritious.
|
Trigger |
Description |
Potential Management Strategy |
|---|---|---|
|
Environmental Factors |
Seasonal changes, humidity, and temperature fluctuations |
Adjust skincare routine according to season, use humidifiers |
|
Hormonal Fluctuations |
Changes in hormone levels, specially androgens |
Monitor hormonal changes, adjust treatment plans as needed |
|
Certain Medications |
Drugs affecting hormone levels or immune response |
Consult healthcare provider about possible side effects |
|
Dietary Influences |
Eating dairy, gluten, yeast |
Keep a food diary, consider elimination diets with professional guidance |
The Stress-Skin Connection: Understanding Psychodermatology
The link between our mind and skin is quite interesting. It’s called psychodermatology. This field looks into how stress affects our skin, like in seborrheic dermatitis.
How the Nervous System Communicates with Skin
Our nervous system and skin are connected in a complex way. They share information through nerve endings, neurotransmitters, and hormones. This lets our brain and skin talk to each other, affecting our health.
Stress makes our nervous system release stress hormones like cortisol. These hormones can change how our skin works. They can affect how much oil we produce, how strong our skin barrier is, and how our immune system reacts.
Stress Hormones and Their Effect on Skin Function
Stress hormones, like cortisol, are key in how we handle stress. High levels of cortisol can harm our skin in several ways:
- It can make our skin oilier, which can worsen conditions like seborrheic dermatitis.
- It can weaken our skin’s barrier, making it easier to get irritated or infected.
- It can change how our immune system works, affecting inflammation and fighting off infections.
|
Stress Hormone |
Effect on Skin |
|---|---|
|
Cortisol |
Increased sebum production, impaired skin barrier function |
|
Adrenaline |
Increased inflammation, possible skin irritation |
The Inflammatory Response to Psychological Stress
Stress can make our body’s immune system go into an inflammatory state. This can really hurt our skin health. Long-term stress can keep inflammation going, making skin conditions like seborrheic dermatitis worse.
This inflammation is caused by pro-inflammatory cytokines. They can mess with our skin’s function and make skin problems worse.
The Vicious Cycle: Skin Conditions Causing More Stress
Skin issues like seborrheic dermatitis can make a bad cycle. The condition can stress us out, making it worse. To break this cycle, we need to tackle both the physical and mental sides of the problem.
Understanding how stress and skin are connected helps us find better ways to manage seborrheic dermatitis. This can improve our skin health overall.
Scientific Evidence: Stress as a Trigger for Seborrheic Dermatitis
Research shows that stress can trigger seborrheic dermatitis flare-ups. Studies have looked into how stress affects the severity of symptoms. This connection is well-documented in various research studies.
A Prospective Study: 82% of Patients Identify Stress as Main Trigger
A study in a top dermatology journal found that 82% of patients with seborrheic dermatitis said stress was a main trigger. The study tracked patients over time, watching their stress and flare-ups. It shows stress plays a big role in the condition.
Case-Control Research: Higher Stress Levels Associated with Flare-Ups
Case-control research has also shown the link between stress and seborrheic dermatitis. It found that those with higher stress levels have more severe symptoms. This research suggests managing stress is key to controlling the condition.
Correlation Between Perceived Stress and Symptom Severity
Studies have also looked at how perceived stress affects symptoms. They found that those who feel more stressed have worse symptoms. This shows addressing stress is vital in treating seborrheic dermatitis.
Stress as a Predictor of Worse Prognosis and Chronic Symptoms
Stress not only triggers flare-ups but also predicts a worse outcome. A study says managing stress is key for better long-term results for patients.
These studies together show stress’s role in seborrheic dermatitis. They highlight the need for stress reduction in treatment plans.
- Key Findings:
- 82% of patients identify stress as a main trigger.
- Higher stress levels are associated with increased symptom severity.
- Perceived stress correlates with symptom severity.
- Stress predicts worse prognosis and chronic symptoms.
The Physiological Pathway: How Stress Worsens Seborrheic Dermatitis
Stress can start a chain of reactions that makes seborrheic dermatitis worse. Knowing how stress affects the body is key to managing symptoms.
Cortisol’s Impact on Sebaceous Gland Activity
Cortisol, a hormone from stress, has a big role in our body’s response. It can make the sebaceous gland work harder, producing more sebum. This can make seborrheic dermatitis symptoms worse.
Stress-Induced Immune Suppression and Malassezia Overgrowth
Stress weakens the immune system, making skin more open to infections. It also makes it harder to control Malassezia yeast growth. This yeast is on our skin and linked to seborrheic dermatitis. Too much of it can cause inflammation and worsen symptoms.
Neurogenic Inflammation in the Skin
Neurogenic inflammation is when nerves release substances that cause inflammation. Stress can make this worse, leading to more inflammation in seborrheic dermatitis. This inflammation can make the skin even more irritated, starting a cycle of discomfort.
Altered Skin Microbiome Under Stress
Stress can upset the balance of the skin’s microbiome. An altered skin microbiome can change how the skin works and reacts to threats. Keeping the skin’s flora in balance is vital for its health.
In summary, stress makes seborrheic dermatitis worse through several ways. These include cortisol’s effect on the sebaceous gland, weakened immune system, neurogenic inflammation, and changes in the skin’s microbiome. Understanding these can help in creating effective treatments that tackle both physical and mental aspects of seborrheic dermatitis.
Recognizing the Clinical Signs of Seborrheic Dermatitis
It’s key to know the signs of seborrheic dermatitis to manage it well. This condition shows specific symptoms and looks different in each person. The severity can also vary.
Characteristic Symptoms and Appearance
Seborrheic dermatitis shows up as red patches with oily scales. These patches can be red, inflamed, and have a yellowish or white scale. It often hits the scalp, face, and torso.
The characteristic symptoms include:
- Redness and inflammation
- Greasy or oily scaling
- Itching or irritation
- Crusting or flaking skin
Differentiating from Similar Skin Conditions
It’s important to tell seborrheic dermatitis apart from other skin issues. This includes psoriasis, eczema, and contact dermatitis.
|
Condition |
Characteristics |
Common Locations |
|---|---|---|
|
Seborrheic Dermatitis |
Erythematous patches with greasy scaling |
Scalp, face, torso |
|
Psoriasis |
Thick, silvery scales on erythematous plaques |
Elbows, knees, scalp |
|
Eczema (Atopic Dermatitis) |
Dry, itchy, inflamed skin |
Face, neck, flexural areas |
|
Contact Dermatitis |
Localized reaction to irritants or allergens |
Variable, depending on exposure |
Severity Assessment: Mild to Severe Presentations
Seborrheic dermatitis can be mild or severe. Knowing the severity helps choose the right treatment.
Mild presentations show little redness and scaling, with minimal discomfort. Severe cases have a lot of inflammation, scaling, and discomfort or itching.
When assessing severity, look at the size of the affected area, how bad the symptoms are, and how it affects daily life.
Diagnosing Seborrheic Dermatitis: The Clinical Approach
Diagnosing seborrheic dermatitis mainly relies on a doctor’s examination and your medical history. We’ll walk you through how to get diagnosed. This includes knowing when to see a dermatologist and how to tell it apart from other skin issues.
When to Consult a Dermatologist
If you think you have seborrheic dermatitis, seeing a dermatologist is key. Look for a doctor if you have ongoing skin problems like redness, itching, or flaking. These symptoms can really affect your life.
A dermatologist will look at your symptoms, medical history, and do a physical check. They might also check for other conditions that could be causing your symptoms.
The Diagnostic Process
Figuring out if you have seborrheic dermatitis takes a detailed look. Here’s what we do:
- Medical history: We look at your overall health, including past skin issues or allergies.
- Physical examination: We check the affected areas for signs like redness, scaling, or crusting.
- Differential diagnosis: We rule out other conditions that might look like seborrheic dermatitis, like psoriasis or eczema.
Ruling Out Other Conditions
Seborrheic dermatitis can look like other skin problems, so we have to be careful. We check for:
- Psoriasis: This has thick, scaly patches on places like elbows, knees, or scalp.
- Eczema (atopic dermatitis): It’s itchy, inflamed skin, often linked to allergies or asthma.
- Fungal infections: Like ringworm or tinea versicolor, which can look similar.
Special Considerations in Different Age Groups
Seborrheic dermatitis can hit anyone, from babies to seniors. We take into account these age-specific things:
- Infants: It shows up as a cradle cap, with oily, yellowish scales on the scalp.
- Adults: We look for signs like dandruff, itching, or redness, often on the face, scalp, or torso.
- Older adults: We watch for more serious symptoms and how other health issues or medicines might play a role.
Medical Treatments for Seborrheic Dermatitis
Seborrheic dermatitis treatment uses many medical therapies. These help manage symptoms and prevent flare-ups. The right treatment depends on how severe the condition is, the patient’s health, and if they have other skin issues.
Targeting Malassezia with Antifungal Therapies
Antifungal therapies are key in treating seborrheic dermatitis. They target the Malassezia yeast that may cause the condition. Topical antifungals like ketoconazole and ciclopirox help reduce yeast on the skin. This lowers inflammation and scaling.
Managing Skin Inflammation with Anti-inflammatory Agents
Anti-inflammatory agents help with the inflammatory part of seborrheic dermatitis. Topical corticosteroids and calcineurin inhibitors reduce redness, swelling, and itching.
Addressing Scaling and Flaking with Keratolytic Products
Keratolytic products, like salicylic acid and sulfur, remove scales and flakes. This improves the skin’s look and helps other treatments work better.
Prescription Options for Severe or Resistant Cases
For severe or treatment-resistant cases, prescription meds are needed. These include stronger topical corticosteroids, antifungal meds, or products that fight both inflammation and fungal infections.
|
Treatment Type |
Examples |
Primary Use |
|---|---|---|
|
Antifungal Therapies |
Ketoconazole, Ciclopirox |
Reducing Malassezia yeast population |
|
Anti-inflammatory Agents |
Topical corticosteroids, Calcineurin inhibitors |
Managing inflammation and itching |
|
Keratolytic Products |
Salicylic acid, Sulfur |
Removing scales and flakes |
|
Prescription Options |
Stronger topical corticosteroids, Antifungal medications |
Treating severe or resistant cases |
Stress Management Strategies for Seborrheic Dermatitis Patients
Managing stress is key to controlling seborrheic dermatitis. It improves skin health and overall life quality. By using stress reduction techniques daily, people can manage their condition better and have fewer flare-ups.
Evidence-Based Stress Reduction Techniques
There are many stress reduction techniques that work well. These include:
- Meditation: Regular meditation can lower stress and boost well-being.
- Yoga: Yoga combines physical poses, breathing, and meditation. It’s great for stress management.
- Deep Breathing Exercises: Simple and effective, deep breathing exercises calm the mind and reduce stress.
Physical Activity and Exercise Benefits
Regular exercise is good for health and stress management. Exercise releases endorphins, or “feel-good” hormones, which reduce stress.
|
Type of Exercise |
Benefits for Stress Management |
|---|---|
|
Aerobic Exercise |
Reduces stress and anxiety by releasing endorphins |
|
Resistance Training |
Improves mood and reduces stress levels |
|
Flexibility Exercises (e.g., Yoga) |
Combines physical movement with stress-reducing techniques |
Sleep Optimization for Skin Health
Good sleep is essential for health, including skin health. Poor sleep can make stress and seborrheic dermatitis symptoms worse.
To improve sleep:
- Stick to a consistent sleep schedule.
- Have a relaxing bedtime routine.
- Avoid screens and stimulating activities before bed.
Professional Mental Health Support When Needed
For some, managing stress might need professional help. This could be therapy or counseling to tackle stress causes.
Seeking help is a sign of strength. It’s a key step in managing seborrheic dermatitis effectively.
Lifestyle Modifications to Reduce Seborrheic Dermatitis Flares
For those with seborrheic dermatitis, making lifestyle changes can help a lot. It’s not just about medical treatment. It’s also about changing daily habits and how we live.
Skincare Routine Adjustments
Changing your skincare routine is key to managing seborrheic dermatitis. Use gentle, fragrance-free cleansers and stick to a routine. Here’s what we suggest:
- Use lukewarm water instead of hot to clean your skin.
- Stay away from harsh products that take away your skin’s natural oils.
- Follow your dermatologist’s advice on medicated shampoos or creams.
Environmental Considerations
Things around us can affect seborrheic dermatitis a lot. Here are some changes to make:
- Try to reduce stress with relaxation techniques, as stress can make it worse.
- Avoid extreme temperatures and humidity levels.
- Use a humidifier in dry places to keep your skin moist.
Dietary Approaches That May Help
What we eat is important for managing seborrheic dermatitis. Some foods and nutrients can help:
- Eat more omega-3 fatty acids from fish and nuts.
- Include foods high in antioxidants like fruits and veggies.
- Stay away from foods that can make symptoms worse, like dairy or gluten for some.
“A well-balanced diet rich in essential nutrients can help manage seborrheic dermatitis and improve overall skin health.”
— Dermatological Insights
Avoiding Known Personal Triggers
Finding and avoiding personal triggers is important for managing seborrheic dermatitis. Here’s how:
- Keep a diary to track when symptoms happen.
- Avoid irritants like certain metals or chemicals.
- Change your lifestyle based on what triggers your symptoms.
By making these lifestyle changes, people with seborrheic dermatitis can manage their condition better. They can also reduce how often they get flares.
Natural and Complementary Approaches to Managing Seborrheic Dermatitis
Seborrheic dermatitis is a chronic skin issue. It can be helped by natural and complementary methods. It’s important to look at the evidence for these approaches.
Evidence-Based Natural Remedies
Some natural remedies are promising for seborrheic dermatitis. These include:
- Tea Tree Oil: It has antifungal properties. This can help control Malassezia yeast, which is linked to the condition.
- Aloe Vera: It has anti-inflammatory properties. This can soothe and reduce scaling on the skin.
- Omega-3 Fatty Acids: These support skin health. They may also reduce inflammation.
Probiotics and Gut-Skin Connection
The gut and skin are connected. Probiotics, which help the gut, can also help the skin. This is important for managing seborrheic dermatitis.
Research shows that certain probiotics can:
- Improve the skin’s barrier
- Reduce inflammation
- Help the immune system
Adding probiotic-rich foods or supplements to your diet might be helpful.
Essential Oils with Antifungal Properties
Some essential oils have antifungal properties. They can help manage Malassezia yeast, which contributes to seborrheic dermatitis. These include:
- Lavender Oil: It’s calming and has antifungal properties.
- Geranium Oil: It may help balance hormones and reduce inflammation.
Always dilute essential oils with a carrier oil. Do a patch test before using them on your skin.
Integrative Medicine Perspectives
Integrative medicine combines traditional treatments with natural therapies. For seborrheic dermatitis, it might include dietary changes, stress management, and natural remedies. This approach is alongside traditional treatments.
Integrative medicine looks at the whole person. It considers body, mind, and spirit. This offers a holistic way to manage seborrheic dermatitis.
Living with Seborrheic Dermatitis: Long-Term Management Strategies
Creating a lasting treatment plan is key for those with seborrheic dermatitis. It helps manage symptoms and lessens the condition’s emotional toll. A good plan includes medical care, lifestyle changes, and ways to handle stress.
Developing a Sustainable Treatment Plan
Every person with seborrheic dermatitis needs a treatment plan that fits them. Working with a dermatologist is vital to find the best treatments. A study in the National Center for Biotechnology Information shows a good plan can greatly improve life quality.
The plan should include:
- Antifungal and anti-inflammatory meds to control symptoms
- Changes in lifestyle, like diet and stress management
- Regular check-ups with a dermatologist to adjust the plan as needed
|
Component |
Description |
Benefits |
|---|---|---|
|
Antifungal Medications |
Targets Malassezia yeast to reduce inflammation |
Controls symptoms, reduces flare-ups |
|
Lifestyle Modifications |
Dietary changes, stress management, and skincare routine adjustments |
Improves overall skin health, reduces stress |
|
Regular Follow-Ups |
Monitoring progress and adjusting the treatment plan |
Ensures the treatment plan remains effective, allows for timely adjustments |
Coping with the Psychological Impact
Seborrheic dermatitis can hurt a person’s self-esteem and life quality. It’s important to tackle this part of the management plan. Stress management techniques, like meditation and yoga, can help.
“The psychological burden of seborrheic dermatitis should not be underestimated. It requires a holistic approach that includes psychological support.”
— Dermatological Expert
Building a Support Network
Having a support network is essential for those with seborrheic dermatitis. This can include family, friends, support groups, and mental health professionals. A strong support system helps cope with the condition better.
When to Reassess and Change Approaches
It’s important to regularly check and change the treatment plan if needed. This might mean adjusting medications, trying new treatments, or changing lifestyle habits. Keeping in touch with a healthcare provider is key to keeping the management strategy effective.
By using a thorough and adaptable approach to manage seborrheic dermatitis, people can improve their life quality and lessen the condition’s impact on daily activities.
Conclusion
Seborrheic dermatitis is a complex condition that can be influenced by stress. We’ve looked into how stress affects this condition, showing the ways it can make it worse. To manage seborrheic dermatitis well, it’s important to tackle stress too.
Knowing what triggers it and making lifestyle changes can help control symptoms. Techniques like meditation and exercise can reduce flare-ups. A treatment plan that includes medical care and stress management can greatly improve life quality.
Reducing stress is good for overall health and helps control seborrheic dermatitis. We suggest working with healthcare experts to create a personalized plan. This plan should use the latest research and treatments to help achieve better skin health.
FAQ
What is seborrheic dermatitis?
Seborrheic dermatitis is a long-term skin issue. It causes inflammation, flaking, and redness. It often hits the scalp, face, and chest.
Can stress trigger seborrheic dermatitis?
Yes, stress can make seborrheic dermatitis worse. Studies show a strong link between stress and how bad the symptoms are.
How does stress affect seborrheic dermatitis?
Stress can make seborrheic dermatitis worse by raising cortisol levels. This can mess with sebaceous glands, weaken the immune system, and cause too much Malassezia.
What are the common symptoms of seborrheic dermatitis?
Symptoms include flaking, redness, itching, and inflammation. These usually show up on the scalp, face, or chest. The condition can be mild or severe.
How is seborrheic dermatitis diagnosed?
A dermatologist will usually diagnose it by looking at your symptoms. They’ll also check to rule out other conditions.
What are the treatment options for seborrheic dermatitis?
Treatments include antifungal and anti-inflammatory medicines. There are also keratolytic products and prescription options for serious cases. Changing your lifestyle and managing stress are also key.
Can seborrheic dermatitis be cured?
There’s no cure, but it can be well-managed. The right treatment, lifestyle changes, and stress management can help.
How can I manage stress to help control seborrheic dermatitis?
Use proven stress-reduction methods, stay active, get enough sleep, and seek mental health help if needed. These can help manage stress and symptoms.
Are there any natural remedies for seborrheic dermatitis?
Yes, natural remedies like probiotics and essential oils with antifungal properties can help. Dietary changes may also help. Always talk to a healthcare professional before trying new treatments.
Can dietary changes help manage seborrheic dermatitis?
Yes, eating to reduce inflammation and support a healthy gut-skin connection can help. Avoiding personal triggers is also important.
How can I prevent seborrheic dermatitis flares?
Keep a regular skincare routine, manage stress, avoid triggers, and stick to your treatment plan. This can lower the chance of flares.
References
- PubMed. Clinical and pathological aspects of seborrhoeic dermatitis: diagnosis and management. https://pubmed.ncbi.nlm.nih.gov/18033062/
- Acta Dermato‑Venereologica. Seborrhoeic dermatitis: clinical manifestations and management. https://www.medicaljournals.se/acta/content/html/10.2340/00015555-3661
- StatPearls (NCBI). Seborrheic Dermatitis. https://www.ncbi.nlm.nih.gov/books/NBK532846/
- MedlinePlus. Seborrheic dermatitis. https://medlineplus.gov/ency/article/000963.htm
- NHS. Seborrhoeic dermatitis. https://www.nhs.uk/conditions/seborrhoeic-dermatitis/
- DermNet NZ. Seborrhoeic dermatitis. https://dermnetnz.org/topics/seborrhoeic-dermatitis