Gastroscopy and colonoscopy can be done at the same time. Gastroscopies and colonoscopies can often be done at the same time because it is more painful to have a gastroscopy and a colonoscopy at the same time, and patients can opt for a painless gastroenteroscopy that only requires a single anesthetic. In addition to this, a gastroscopy and colonoscopy at the same time can save some money. Before doing gastroscopy and colonoscopy at the same time, the patient should first consult the doctor to clarify whether the body has the appropriate conditions, and should also do fasting, to prevent the results of the examination or the emergence of abnormalities. Patients with unexplained gastrointestinal diseases should consult a doctor in time, follow the doctor’s instructions for gastroscopy and enteroscopy, and choose the appropriate method of treatment.