Pharyngitis - viral

• Causes, incidence, and risk factors

  Viral pharyngitis is the most common cause of a sore throat.

  Pharyngitis may occur as part of a viral infection that also involves other organ systems, such as the lungs or bowel.

• Symptoms
  • Discomfort when swallowing
  • Fever
  • Joint pain or muscle aches
  • Sore throat
  • Tender, swollen lymph nodes in the neck
• Signs and tests

  Usually the health care provider makes a diagnosis by examining the throat. A throat swab culture will be negative for bacterial causes of sore throat (such as group A streptococcus).

• Treatment

  There is no specific treatment for viral pharyngitis. You can relieve symptoms by gargling with warm salt water (one half-teaspoon of salt in a glass of warm water) several times a day and taking anti-inflammatory drugs or medications, such as acetaminophen, to control fever. Excessive use of anti-inflammatory lozenges or sprays may make a sore throat worse.

  It is important to avoid antibiotics when a sore throat is due to a viral infection. The antibiotics will not help. Using them to treat viral infections helps strengthen bacteria to become resistant to antibiotics.

  In some sore throats (such as infectious mononucleosis), the lymph nodes in the neck may become extremely swollen. They may be treated with anti-inflammatory drugs, such as prednisone.

• Expectations (prognosis)

  Symptoms usually go away within a week to 10 days.

• Complications

  Complications of viral pharyngitis are extremely uncommon.

• Calling your health care provider

  Call for an appointment with your health care provider if symptoms last longer than expected or do not improve with self-care. Always seek medical care if you have a sore throat and have extreme discomfort or difficulty swallowing or breathing.

• Prevention

  Most cases are not preventable, because the viruses and bacteria that cause sore throats are commonly found in the environment. However, always wash your hands after contact with a person who has a sore throat. Avoid kissing or sharing cups and eating utensils with sick individuals.

• References

  Hayden GF, Turner RB. Acute pharyngitis. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 378.

  Jenson HB. Epstein-Barr virus. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 251.

Review Date: 8/12/2008

Reviewed By: Linda Vorvick, MD, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.