A sore throat, also called a throat infection or pharyngitis, is a painful inflammation of the back part of the throat (pharynx). Pharyngitis can involve some or all of these parts of the throat:
the back third of the tongue
the soft palate (roof of the mouth)
the tonsils (fleshy tissue that are part of the throat's immune defenses).
The most common cause of sore throat is infection with bacteria or a virus.
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