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Reiter's syndrome

Reactive arthritis is a condition that causes inflammation (redness and swelling) to develop at various places in the body.
Symptoms of reactive arthritis
The symptoms of reactive arthritis usually develop two to four weeks after an infection.
Causes of reactive arthritis
It's not known exactly what causes reactive arthritis, but it is thought to be the result of the immune system reacting to a previous infection.
Treating reactive arthritis
There's no cure for reactive arthritis, but the condition is usually temporary and medication can help relieve your symptoms.
Preventing reactive arthritis
The most effective way to prevent reactive arthritis is to avoid the most common infectious causes of the condition.