Young people can do colonoscopy, colonoscopy is a relatively common examination of the digestive system, the clinical does not make restrictions on the population of colonoscopy, if the young people disease needs, you can do colonoscopy, so do not believe the so-called does not recommend that young people easily do colonoscopy. Colonoscopy is a thin, bendable medical instrument that enters the rectum through the anus and reaches to the large intestine, and it is a kind of examination to check the lesions inside the large intestine and colon. People for whom colonoscopy is appropriate include unexplained lower gastrointestinal bleeding, unexplained chronic diarrhea, unexplained low bowel obstruction, patients with colorectal cancer or adenocarcinoma in their family, and colorectal cancer screening. There is no clinical age limit for colonoscopy, so if young people have the above conditions, they can have a normal colonoscopy. The whole process of colonoscopy takes about 20~30 minutes, and you need to actively cooperate with the doctor when doing colonoscopy again. If you feel obvious discomfort, you should inform the doctor in time, so that the doctor can make corresponding treatment.