Because only the lower part of the colon is examined, the prep is usually lighter than for a full colonoscopy but still important. You’ll receive instructions about diet changes, clear liquids, and bowel prep, which may include enemas and/or a laxative drink to clean out the rectum and sigmoid colon. Your colon needs to be empty so the camera can get a clear view.

You’ll also receive directions about when to stop food and liquids before the procedure, and if you take blood thinners or diabetes medications, you’ll get specific guidance from your care team.

When you arrive, you’ll check in and review your medical history and medications. If sedation is planned, an IV may be started. In the procedure room, you’ll usually lie on your left side. Lubricating gel is applied, and the scope is gently inserted through the anus into the rectum and sigmoid colon. Air or carbon dioxide is used to expand the lower bowel for better viewing, which can cause some cramping or a feeling of fullness.

Your provider examines the lining on the screen and may take biopsies or remove small polyps if needed. The scope is then slowly removed while the area is re-checked. The active exam itself usually takes only a few minutes.

After the procedure, you may feel gassy or have mild cramping as air passes out of the bowel. If you received sedation, you’ll rest in recovery until you are more awake, and you’ll need a responsible adult to drive you home. Many people can return to light activities later that day, but avoid driving, alcohol, or important decisions until the sedative fully wears off.

Minor spotting of blood can occur if biopsies were taken, but you should call your provider or seek urgent care if you develop heavy bleeding, severe abdominal pain, fever, or feel very unwell after the test.