A gastroenteroscopy is generally not harmful to the body, but because of the way the test is performed, the subject may experience some discomfort. Gastroenteroscopy is a more effective way used to check digestive system diseases. Common gastroenteroscopy may cause a series of discomforts to the patient, such as nausea, vomiting and so on, but it is generally harmless to the body, and you only need to prepare your gastrointestinal tract and cooperate with the examination correctly under the doctor’s guidance. Gastroenteroscopy can perform early cancer screening and diagnosis of gastrointestinal diseases. Compared with traditional gastroenteroscopy, painless gastroenteroscopy uses anesthesia, so there will be allergy to anesthesia drugs, respiratory depression, etc. You need to cooperate with the doctor to do a comprehensive diagnosis and evaluation before the examination to prevent the emergence of such adverse reactions. Painless gastroenteroscopy technology is more advanced, generally speaking, it will not cause any harm to the body.