People’s mouth is a more sensitive place, but oral examination and treatment to contact the mouth, many people appear nausea and vomiting, how to do? First of all, we need to know why nausea? Because the buccal part of the mouth, the tongue mucosa has a rich distribution of nerves, which will reflexively cause the movement of the pharynx and nausea symptoms. The frequent occurrence of nausea affects the operation, easily causes misaspiration, mispharyngeal, accident, and causes contamination of the needle during oral anesthesia, resulting in local and deep infection. Nausea can be changed, is to breathe through the nostrils, keep the mouth stable, do not do any oral activities, including not using oral breathing, as long as the control of oral activities, you can avoid the movement of nausea. Try it yourself first!