Irritable Bowel Syndrome (IBS): Symptoms, Causes, and Treatment Guide
Irritable bowel syndrome, or IBS, is a chronic condition in which the digestive system does not function properly. Affecting about 11 percent of people worldwide, it can cause abdominal pain, bloating, constipation, diarrhea, or a combination of these symptoms.
In irritable bowel syndrome, the problem lies in how the intestines work rather than how they look. Because it is a functional disorder and not a structural one, diagnosing IBS can be challenging. When communication between the brain and the intestines is disrupted, the intestines cannot function normally, leading to the development of IBS.
The answers to questions such as "What are the symptoms of irritable bowel syndrome?" and "What causes irritable bowel syndrome and how can it be treated?" are explained in more detail in the following sections.

Irritable Bowel Syndrome Types
Irritable bowel syndrome involves changes in bowel habits, which may include diarrhea, constipation, or both. Experts classify it into types depending on the predominant pattern of bowel movement changes:
- IBS with more frequent constipation
- IBS with more frequent diarrhea
- IBS with both diarrhea and constipation on the same day
- Unspecified IBS
Symptoms and Causes of Irritable Bowel Syndrome
But what causes IBS? Although IBS was first described in the 1970s, its exact causes remain unclear. Researchers believe that a combination of factors”including gut-brain interaction, gut bacteria balance, and environmental triggers”may all contribute to its development. However, the main causes of IBS can be listed as follows:
So, what causes IBS? Although the first diagnosis of IBS was made in the 1970s, precise information about its causes is still not fully understood. However, the main causes of irritable bowel syndrome can be listed as follows:
- The majority of experts argue that biopsychosocial factors, including psychological, behavioral, psychosocial, and environmental factors, may play a role in the development of IBS.
- Among the main causes of IBS is the disruption of communication between the intestinal muscles and nerves, resulting in dysfunction during bowel movements.
- It can occur following severe diarrhea caused by bacterial or viral infections.
- Imbalance in the beneficial and harmful bacteria in the gut flora can lead to the development of IBS.
Additionally, there are some identified risk factors for irritable bowel syndrome, including:
- Gender: Irritable bowel syndrome is a common disorder affecting people of all genders and ages, but studies suggest that it is approximately 1.5 to 3 times more common in women compared to men. This suggests that hormones may play a role in triggering the symptoms of the disease.
- Age: Irritable bowel syndrome can occur at any age, but the majority of patients experience it for the first time before the age of 35.
- Genetic predisposition: Research indicates that the risk of developing this disease may be approximately 2 times higher in individuals with a family history of IBS.
Irritable bowel syndrome is a health problem characterized by irregularities in bowel movements. The main symptoms of irritable bowel syndrome can be listed as follows:
- Abdominal pain, cramps, and bloating,
- Diarrhea and/or constipation,
- Nausea, vomiting,
- Changes in bowel movements and appearance of stool,
- Relief of abdominal pain after bowel movements.
How is Irritable Bowel Syndrome Diagnosed?
A key criterion for diagnosing IBS is abdominal pain that has lasted more than six months and occurs at least once a week in the past three months. In addition, IBS is likely if at least two of the following are present:
• Pain related to bowel movements
• Changes in the frequency of bowel movements
• Changes in the consistency of stool (harder or looser than usual). These symptoms are as follows:
In cases where there is no structural problem in the intestines, experts consider irritable bowel syndrome. At this stage, the patient is asked some questions such as when the symptoms started, how long they have been going on, and how often the symptoms occur. In the diagnostic stage, it is important to determine when the abdominal pain started and how often it recurs.
During the diagnosis of the disease, experts ask patients some questions. The presence of abdominal pain lasting for more than six months and occurring at least once a week in the past three months is an important criterion for diagnosis. Additionally, the presence of at least two of the following three symptoms in the patient can also lead experts to consider the presence of IBS. These symptoms are as follows:
- Pain during defecation,
- Changes in defecation frequency,
- Changes in stool consistency (solid or loose).
In addition to the above, the absence of any symptoms that may suggest colorectal (colon-rectum) cancer risk or bleeding in the digestive system, as well as the absence of other health problems such as unexplained weight loss, is important in the diagnosis of IBS.
In patients without any symptoms that may indicate a more serious problem, a diagnosis of irritable bowel syndrome can be made without the need for additional tests if at least two of the above symptoms are present.
In some cases, the expert doctor may also use colonoscopy, a method that allows detailed imaging of the intestines using a thin tube, to confirm that there is no serious health problem. In addition, radiological imaging methods such as computerized tomography (CT) can also help exclude serious illnesses by obtaining detailed images of the abdominal region.

Irritable Bowel Syndrome Treatment Methods
Irritable bowel syndrome negatively affects individuals' quality of life. So, how can irritable bowel syndrome be treated? Since irritable bowel syndrome is not a structural problem of the intestine, there is no proven definitive treatment method in treatment. Experts primarily develop a treatment plan aimed at relieving symptoms.
In the treatment of IBS, it is important for patients to make changes in their diet and lifestyle habits. In patients with mild symptoms, dietary and lifestyle changes can often help solve the problem. However, in patients with severe symptoms, antidepressant medications or probiotics that help regulate bowel movements may be used in some cases. However, like other treatment methods, these medications are aimed at relieving symptoms rather than curing the disease definitively.
Here are some suggestions that may help alleviate symptoms associated with irritable bowel syndrome:
- Being diligent about regular exercise,
- Avoiding habits such as smoking and alcohol consumption,
- Following the irritable bowel syndrome diet list recommended by the expert doctor and tailored to the individual,
- Reducing portion sizes and increasing the frequency of meals,
- Engaging in hobbies that can help reduce stress,
- Taking notes of consumed foods and beverages to understand which ones trigger IBS symptoms.
* Liv Hospital Editorial Board has contributed to the publication of this content .
* Contents of this page is for informational purposes only. Please consult your doctor for diagnosis and treatment. The content of this page does not include information on medicinal health care at Liv Hospital .
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Frequently Asked Questions
What is irritable bowel syndrome?
Irritable bowel syndrome (IBS) is a chronic functional disorder that affects how the digestive system works, leading to abdominal pain, bloating, and changes in bowel habits.
What causes irritable bowel syndrome?
The exact cause is unknown, but factors such as stress, hormonal changes, gut bacteria imbalance, and communication issues between the brain and intestines are believed to play a role.
What are the symptoms of IBS?
Common symptoms include abdominal pain, bloating, constipation, diarrhea, or alternating episodes of both.
Can stress make IBS worse?
Yes. Emotional stress and anxiety can worsen symptoms by affecting gut movement and sensitivity.
How is IBS diagnosed?
Diagnosis is based on symptoms lasting over six months, with pain occurring at least once a week, along with changes in stool frequency or consistency.
Is IBS a serious condition?
IBS is not life-threatening, but it can significantly affect daily comfort and quality of life.
Can IBS be cured?
There is no permanent cure, but symptoms can be managed effectively through dietary changes, stress control, and medical guidance.
Which foods should be avoided with IBS?
Foods that commonly trigger IBS include caffeine, dairy, fatty foods, carbonated drinks, and artificial sweeteners.
Is IBS more common in women?
Yes. IBS is seen 1.5 to 3 times more often in women, possibly due to hormonal differences.
Why choose Liv Hospital for IBS treatment?
Liv Hospital provides specialized gastroenterology care with expert physicians, personalized diet plans, and advanced diagnostic techniques for effective IBS management.