Diagnosis

Tests and procedures used to diagnose proctitis include:

• Blood tests. These can detect blood loss or infections.
• Stool test. You may be asked to collect a stool sample for testing. A stool test may help determine if your proctitis is caused by a bacterial infection.
• Scope exam of the last portion of your colon. During this test (flexible sigmoidoscopy), your doctor uses a slender, flexible, lighted tube to examine the last part of your colon (sigmoid), as well as the rectum. During the procedure, your doctor can also take small samples of tissue (biopsy) for laboratory analysis.
• Scope exam of your entire colon. This test (colonoscopy) allows your doctor to view your entire colon using a thin, flexible, lighted tube with an attached camera. Your doctor can also take a biopsy during this test.
• Tests for sexually transmitted infections. These tests involve obtaining a sample of discharge from your rectum or from the tube that drains urine from your bladder (urethra).