Ulcerative colitis affects the colon (large intestine) and rectum. The immune system, which normally protects the body from infection, mistakenly attacks the bowel lining. This causes inflammation,
it often begins with a throbbing pain that makes sitting unbearable. You might notice swelling near the anus, then a discharge that brings brief relief—only for the cycle to repeat weeks later.
Consider a common situation. A shopkeeper lifts a heavy sack and later notices a soft bulge in his groin. It disappears when he lies down, so he ignores it for months. Then it grows and starts to