The vivid blue and orange blocks in the picture help you quickly distinguish these two examinations! Dark blue represents anoscopy, while amber orange stands for colonoscopy. Let's clearly explain the differences in plain language to help you choose the right diagnostic method.

Colonoscopy vs. Proctoscopy

Proctoscopy (dark blue block): Acts like a "local magnifier," examining only the anus to the distal rectum (about 10 cm). The procedure is extremely simple, taking just 5 minutes, requires no complex preparation, and causes minimal discomfort. Suitable for those experiencing bloody stools, anal itching, painful bowel movements, or suspected hemorrhoids or anal fissures—specifically targeting perianal issues.

Colonoscopy (amber-orange block): Serves as a "full colon detector," capable of examining the entire large intestine (about 1.5 meters). Requires bowel preparation in advance and takes slightly longer to perform, but it can detect colon polyps, inflammation, and even early-stage tumors. Suitable for individuals with abdominal pain, bloating, chronic diarrhea or constipation, unexplained bloody stools, or those aged 40+ requiring routine screening—comprehensively assessing colon health.

In short: Opt for proctoscopy for perianal discomfort, and choose colonoscopy for a full intestinal evaluation or routine screening. By matching your symptoms with the color-coded descriptions, you can easily determine the right examination for your needs!