Septic arthritis is inflammation of a joint caused by bacterial infection. It is usually due to bacteria entering through a nearby open wound or traveling through the bloodstream from an infection elsewhere.
Symptoms usually appear suddenly and may include swelling, redness, and warmth around the affected joint; severe joint pain; restricted movement of the joint; and fever.
Treatment is with antibiotics, pain relievers, and rest.
The joint may also be drained if pus has built up inside it.

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