Lyme disease occurs when a human is bitten by an infected black-legged tick (or deer tick)

Reactive Arthritis or Reiter’s Syndrome is an uncommon autoimmune disease.

Lupus is an autoimmune condition, that causes inflammation to various parts of the body, including, your joints, skin, kidneys, blood cells, brain, heart and lungs.

Crohn's Disease is a type of inflammatory bowel disease (IBD).

AS is a form of Arthritis that affects the spine, lower back and sacroiliac joints (joints connecting the pelvic and lower spine).

Initially, AOSD may only cause some pain and stiffness in your joints, but as the disease progresses, it can spread to other joints, and cause fevers and rashes.