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Sore Throat (Pharyngitis)

Teen Version

What is a sore throat?

When your throat hurts it is often a symptom of an illness, such as a cold. When someone looks at the throat with a light, it will be bright red.

What is the cause?

Most sore throats are caused by viruses and are part of a cold. About 10% of sore throats are caused by strep bacteria.

Tonsillitis (temporary swelling and redness of the tonsils) is usually present with any throat infection, viral or bacterial. The presence of tonsillitis does not have any special meaning.

Teens who sleep with their mouths open often wake in the morning with a dry mouth and sore throat. It feels better within an hour of having something to drink. Use a humidifier to help prevent this problem.

Teens with a postnasal drip from draining sinuses often have a sore throat from the secretions or from frequent throat clearing. Talk to your health care provider about treatment for sinus infections.

How long does it last?

Sore throats caused by viral illnesses usually last 4 or 5 days.

Strep throat responds well to penicillin or other antibiotics. After you have been taking medication for strep for 24 hours, strep is no longer contagious. You can then return to school if your fever is gone and you are feeling better.

Why do a throat culture?

A throat culture or rapid strep test is the only way to know whether a sore throat is caused by strep bacteria or a virus. Without treatment, a strep throat has a small risk for acute rheumatic fever. Rheumatic fever is a complication of strep infections that can lead to permanent damage to the valves of the heart. The throat culture is not urgent, however, since treating a strep infection within 7 days of when it begins can prevent rheumatic fever.

A throat culture is not necessary if your sore throat is part of a cold AND the main symptom is croup, hoarseness, or a cough, unless the sore throat lasts more than 5 days.

How do I take care of myself?

  • Throat pain relief

    Gargle with warm saltwater (1/4 teaspoon of salt per glass) or an antacid solution. Suck on hard candy (butterscotch seems to be a soothing flavor).

  • Diet

    Swollen tonsils can make some foods hard to swallow. Eat a diet of soft foods for a few days.

  • Fever and pain relief

    Take acetaminophen (Tylenol) or ibuprofen (Advil) for the sore throat or for fever over 102F (39C).

  • Common mistakes in treating sore throat
    • Avoid expensive throat sprays or throat lozenges. Not only are they no more effective than hard candy, but many also contain an ingredient (benzocaine) that may cause an allergic reaction.
    • Do not use leftover antibiotics from siblings or friends. Antibiotics help only strep throats. They have no effect on viruses, and they can cause harm. They also make it difficult to find out what is wrong if you become sicker.
  • Rapid strep tests

    Rapid strep tests are helpful only when their results are positive. If they are negative, a routine throat culture should be performed to pick up the 20% of strep infections that the rapid tests miss. Avoid rapid strep tests performed in shopping malls or at home because they tend to be inaccurate.

When should I call my health care provider?


  • You are having great trouble swallowing (for example, you can't swallow your saliva).
  • You are having trouble breathing.
  • You are feeling very sick.

Call during office hours if:

  • To make an appointment for a throat culture.
Written by B.D. Schmitt, M.D., author of "Your Child's Health," Bantam Books.
Published by McKesson Provider Technologies.
Last modified: 2006-07-31
Last reviewed: 2006-02-23
This content is reviewed periodically and is subject to change as new health information becomes available. The information is intended to inform and educate and is not a replacement for medical evaluation, advice, diagnosis or treatment by a healthcare professional.
Copyright 2006 McKesson Corporation and/or one of its subsidiaries. All Rights Reserved.
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