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Overview

What Is Pharyngitis?

Pharyngitis is inflammation of the throat, also called the pharynx. Viruses cause most cases, but bacteria can also cause it, including group A Streptococcus. Pharyngitis can affect children and adults. Acute pharyngitis often causes a sore throat that improves as the underlying infection or irritation resolves.

Symptoms

Symptoms of Pharyngitis

  • Sore throat
  • Pain when swallowing
  • Redness in the throat
  • Fever
  • Swollen neck glands
  • Headache
  • Cough
  • Runny nose
  • Hoarseness
  • White patches or pus on the tonsils when present

How It Spreads

How Pharyngitis Spreads

Viral and bacterial pharyngitis can spread through respiratory droplets, saliva, close contact, and contaminated hands or shared objects. Noninfectious throat irritation caused by allergies, acid reflux, smoke, or other irritants does not spread from person to person.

  • Wash your hands often with soap and water or use hand sanitizer when soap is unavailable.
  • Cover coughs and sneezes with a tissue or your elbow.
  • Avoid sharing utensils, cups, bottles, or drinks.
  • Stay home when you have a fever or feel acutely ill.

Risk Factors

Risk Factors for Pharyngitis

  • Young age can increase the likelihood of developing pharyngitis, particularly during childhood.
  • Close contact with school-age children or crowded groups can increase exposure to respiratory infections.
  • Seasonal respiratory infections can make pharyngitis more likely during periods when these illnesses circulate.
  • Exposure to someone with a sore throat can increase the risk of an infectious cause.
  • A weakened immune system can make some infections more likely or more severe.
  • Tobacco smoke or air pollution can irritate the throat and increase symptoms.
  • Allergies can cause ongoing throat irritation and inflammation.
  • Acid reflux can irritate the throat and contribute to recurrent symptoms.

Complications

Possible Complications

  • Dehydration can occur when throat pain makes it difficult to drink enough fluids.
  • A peritonsillar abscess can cause severe one-sided throat pain, swelling, and difficulty opening the mouth.
  • A deep neck infection is an uncommon but serious infection in tissues around the throat.
  • An ear or sinus infection can develop during or after some respiratory infections.
  • After certain untreated streptococcal infections, rheumatic fever can affect the heart, joints, skin, or brain.
  • After certain untreated streptococcal infections, kidney inflammation can affect kidney function.

Diagnosis

How Pharyngitis Is Diagnosed

A clinician reviews symptoms, recent exposures, and health history, then examines the throat and neck. The examination may show findings that suggest a viral illness, streptococcal infection, or another cause of throat inflammation. The clinician also considers symptom duration, fever, cough, swollen glands, and tonsil changes.

Testing for group A Streptococcus

  • A rapid strep test uses a throat swab to look for group A Streptococcus and can provide results quickly.
  • A throat culture examines the swab in a laboratory and may identify an infection when a rapid test does not.
  • Testing decisions depend on age, symptoms, examination findings, and local clinical guidance.
  • Imaging or additional tests are generally reserved for suspected complications or unusual causes.

Treatment & Management

Treatment and Management of Pharyngitis

Supportive care for pharyngitis may include drinking fluids, resting, using warm liquids, and gargling with salt water when appropriate. Humidified air may ease throat irritation. Age-appropriate pain or fever medicine can be used according to the product label or a clinician’s guidance. Acute pharyngitis caused by a virus usually improves with supportive care rather than antibiotics.

When antibiotics are used

  • Antibiotics are used for a confirmed or clinically indicated bacterial infection, not for routine viral pharyngitis.
  • Complete the prescribed antibiotic course unless your clinician tells you to stop or changes the treatment.
  • Do not share leftover antibiotics or use medicine prescribed for someone else.
  • Treat contributing allergies, reflux, or irritant exposure when these factors are relevant.

Prevention

How to Prevent Pharyngitis

  • Wash your hands frequently, especially after coughing, sneezing, or being around someone who is ill.
  • Cover coughs and sneezes with a tissue or your elbow.
  • Avoid close contact with people who have a contagious respiratory illness when possible.
  • Do not share cups, bottles, utensils, or other items that touch the mouth.
  • Avoid tobacco smoke and other known throat irritants.
  • Manage allergies or acid reflux as advised by a healthcare professional.

Outlook and Prognosis

Outlook and Prognosis

Most uncomplicated cases of pharyngitis improve within several days to about a week. Recovery depends on the cause, and symptoms from a bacterial infection should improve after appropriate treatment. Repeated episodes may be related to frequent infections, allergies, reflux, irritants, or another condition.

  • Arrange reassessment if symptoms persist beyond the expected course.
  • Seek medical advice if pharyngitis recurs frequently.
  • Contact a clinician if symptoms worsen after initial improvement.
  • Seek prompt care for difficulty swallowing, breathing, or opening the mouth.

When Should You See a Doctor

When Should You See a Doctor for Pharyngitis?

Arrange a medical visit for a severe or persistent sore throat, a high or ongoing fever, suspected exposure to strep throat, or repeated episodes of pharyngitis. People with a weakened immune system should seek advice sooner when they develop throat symptoms. A clinician can determine whether testing or treatment is needed.

Get urgent help

Watch for serious symptoms

Seek urgent or emergency medical care for trouble breathing, inability to swallow liquids or saliva, drooling, severe dehydration, rapidly increasing neck swelling, confusion, or a muffled voice.

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