Reiter syndrome is a type of reactive arthritis that happens as a reaction to a bacterial infection in the body. The infection usually happens in the intestines, genitals, or urinary tract.
Reiter syndrome includes redness, joint swelling and pain, often in knees, ankles, and feet, along with inflammation of the eyes and urinary tract. It is not contagious. But the bacteria that trigger it can be passed from one person to another.
There is no cure for Reiter syndrome, but you can control the symptoms. For most people, symptoms go away in 2 to 6 months.