If the patient’s high blood pressure is uncontrollable, painless gastroscopy is not recommended; if the high blood pressure is mildly increased or can be controlled by medication, painless gastroscopy can be performed. Painless gastroscopy is operated under general anesthesia, if the patient’s blood pressure is too high, it is easy to have shock, cerebral hemorrhage and other complications during the operation, therefore, when the patient’s blood pressure is too high and uncontrollable, it is not recommended to choose the painless gastroscopy, and choose the ordinary gastroscopy. If the patient’s blood pressure control is stable, usually take regular antihypertensive drugs, and the current blood pressure level is normal, generally can perform painless gastroscopy. Before performing painless gastroscopy, patients should consult a medical professional to see if it is suitable for them, and follow the advice of the medical professional. In addition, before doing painless gastroscopy, patients should prohibit smoking, alcohol and staying up late to reduce the impact of adverse factors on the body, and must do a good job of digestive tract preparation, fasting for 6 to 8 hours to reduce the impact of food residues on the results of gastroscopy.