Painless gastroscopy to avoid choking, need to deal with the cause, may be drug factors, operating factors, disease factors and other causes. 1. Drug factors: such as oral dacronine hydrochloride gel paste easily cause pharyngeal secretion increase, causing choking, you can take scopolamine before surgery to reduce secretion. 2. Operational factors: probe stimulation of the pharyngeal wall, epiglottis and arytenoid cartilage can cause choking, the operator should try to avoid stimulation of these parts. 3. Disease factors: reflux esophagitis and other diseases can also cause choking, and need to be actively treated before receiving painless gastroscopy. 4. Other factors: mental tension leads to muscle tension, may also cause choking, so you need to adjust the breathing under the guidance of a specialist to maintain emotional stability, to promote muscle relaxation, to help avoid choking. In addition, painless gastroscopy has certain contraindications, patients need to consult a specialist before undergoing the examination.