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The most common cause of a sore throat, usually from a virus, such as a cold or the flu.

Rest, drink liquids and gargle with warm salt water. Take pain relievers bought without a prescription to ease pain. Don't give children aspirin.

See a doctor immediately if:

• Drooling or trouble swallowing
• Trouble breathing

Make an appointment to see a doctor for:

• Symptoms that last a week or longer for an adult.
• Fever, rash or joint pain.
• Blood in mucus.