Sore throat, also known as throat pain, is pain or irritation of the throat.
It is usually caused by
pharyngitis ( inflammation of the throat) or tonsillitis (inflammation of the tonsils). It can also result from trauma.
About 7.5% of people have a sore throat in any three-month period.
A sore throat is pain anywhere in the throat.
 Differential diagnosis
A sore throat is usually from irritation or inflammation. The most common cause (80%) is
acute viral pharyngitis, a viral infection of the throat. Other causes include other infections (such as  streptococcal pharyngitis), trauma, and tumors.  Gastroesophageal (acid) reflux disease can cause stomach acid to back up into the throat and also cause the throat to become sore. In children streptococcal pharyngitis is the cause of 37% of sore throats. 
Pain medications such as
non-steroidal anti-inflammatory drugs (NSAIDs) and paracetamol (acetaminophen) help in the management of pain.  The use of  corticosteroids seems to increase the likelihood of resolution and reduce the level of pain.  Antibiotics shorten the duration of pain symptoms by an average of about one day. 
Mayo Clinic advises gargling with salty warm water and resting the voice.
Without active treatment, symptoms usually last two to seven days.
In the United States there are about 2.4 million
emergency department visits with throat-related complaints per year.
Jones, Roger (2004). . Oxford University Press. p. 674. Oxford Textbook of Primary Medical Care ISBN 9780198567820.
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