Proctitis is inflammation of the lining of the rectum. The rectum is a muscular tube that's connected to the end of your colon. Stool passes through the rectum on its way out of the body.

What organ is affected by proctitis?

Proctitis is inflammation of the lining of the rectum, the lower end of the large intestine leading to the anus. Common causes of proctitis are sexually transmitted diseases (STDs), non-STD infections, anorectal trauma, ulcerative colitis and Crohn's disease, radiation therapy, and antibiotic use.

Is proctitis a hemorrhoid?

Proctitis is inflammation of the rectal mucosa, distal to the rectosigmoid junction, within 18 cm of the anal verge. Anusitis is inflammation of the lining of the anal canal. Anusitis is a common disorder that is often misdiagnosed as hemorrhoids.