Capsule endoscopy is a non-surgical test that uses a swallowed pill-sized camera to take pictures of the small intestine. It may help evaluate bleeding, anemia, Crohn’s disease, ulcers, or symptoms that remain unexplained after other digestive tests.
Medically Reviewed by Dr. Bharat Pothuri, MD, FACG | Updated 06-01-2026
Capsule endoscopy uses a tiny wireless camera inside a capsule. After you swallow it, the camera takes images as it travels through the digestive tract, especially the small intestine.
This test is different from a traditional scope procedure because the capsule is swallowed and does not allow biopsy or treatment during the test.
The pill camera helps your gastroenterologist look for small bowel findings that may not be seen during upper endoscopy or colonoscopy.
Your doctor may recommend capsule endoscopy when symptoms, blood work, or prior tests suggest a small intestine problem.
It may help find bleeding sources in the small intestine when other tests are normal.
Ongoing anemia may need evaluation for hidden blood loss or small bowel disease.
The capsule may show inflammation, ulcers, or narrowing in the small intestine.
It can help identify ulcer-like changes or irritation in areas standard scopes may not reach.
Persistent symptoms may need small bowel evaluation after other testing.
Capsule findings are interpreted with labs, imaging, and prior procedure reports.
Capsule endoscopy can help identify small bowel findings that may explain bleeding, anemia, pain, diarrhea, or suspected inflammatory disease.
It may show vascular lesions, ulcers, or other possible bleeding areas.
Inflammatory changes may support evaluation for Crohn’s disease or other conditions.
The capsule may capture ulcer-like areas that need further review.
Some growths or abnormal areas may be visible on capsule images.
It may show mucosal changes, though diagnosis often needs blood tests and biopsy.
Movement through the bowel is reviewed as part of the image study.
Capsule endoscopy may be considered when the suspected problem is in the small intestine or when symptoms continue after other tests.
Unexplained anemia can sometimes come from hidden GI blood loss.
Blood in stool after normal tests may need deeper small bowel evaluation.
Small bowel Crohn’s may require imaging beyond colonoscopy.
Capsule endoscopy may be a next step if symptoms remain unexplained.
Watch this capsule endoscopy overview, then follow the written instructions from your GastroDoxs care team for your exact fasting, medication, sensor, recorder, and return instructions.
| Want procedure-day details? | Review what happens during capsule endoscopy, including fasting, swallowing the capsule, wearing the recorder, daily activity guidance, and how results are reviewed. Read what to expect during capsule endoscopy. |
| Ready to discuss symptoms? | If capsule endoscopy may be needed for anemia, bleeding, Crohn’s disease concerns, or unexplained symptoms, use the scheduling page to understand appointment options. See capsule endoscopy scheduling options. |
Capsule endoscopy is a diagnostic test where you swallow a small camera capsule. It is mainly used to view the small intestine and evaluate bleeding, anemia, Crohn’s disease, ulcers, or unexplained digestive symptoms.
Capsule endoscopy is generally safe. The main risk is capsule retention, where the capsule becomes stuck, especially in people with strictures, obstruction, or known narrowing of the intestine.
The capsule records images for several hours while it moves through the digestive tract. Preparation may include fasting, medication review, and specific instructions from your care team.
Ongoing blood in the stool needs medical follow-up. If colonoscopy was normal, your gastroenterologist may consider other sources, including the small intestine, and may recommend capsule endoscopy or additional testing.
Traditional endoscopy uses a flexible scope to view the upper digestive tract or colon. Capsule endoscopy is swallowed and is mainly used to image the small intestine, which standard scopes may not fully reach.
Capsule endoscopy may help evaluate small bowel bleeding, Crohn’s disease, ulcers, tumors, polyps, celiac-related changes, and unexplained iron-deficiency anemia.
Patients with persistent bleeding, unexplained anemia, suspected small bowel Crohn’s disease, or symptoms that remain unexplained after standard endoscopy may need capsule endoscopy.
Capsule endoscopy is designed to capture images through much of the small intestine. In some cases, movement may be slow or incomplete, so your doctor interprets results with your symptoms and other tests.
The capsule passes naturally in a bowel movement. Your care team reviews the recorded images and explains whether follow-up, treatment, or additional testing is needed.
Yes, capsule retention can occur, but it is uncommon. Patients with strictures, obstruction, or prior bowel surgery may need additional screening before capsule endoscopy.