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A sore throat is pain, scratchiness or irritation of the throat that often worsens when you swallow. The most common cause of a sore throat (pharyngitis) is a viral infection, such as a cold or the flu. A sore throat caused by a virus resolves on its own.
Strep throat (streptococcal infection), a less common type of sore throat caused by bacteria, requires treatment with antibiotics to prevent complications. Other less common causes of sore throat might require more complex treatment.
Causes
Viruses that cause the common cold and the flu also cause most sore throats. Less often, bacterial infections cause sore throats.
Symptoms
Symptoms of a sore throat can vary depending on the cause. Signs and symptoms might include:
Infections causing a sore throat might result in other signs and symptoms, including: