In the middle of the night, if the sudden appearance of stomach acidity accompanied by nausea and vomiting symptoms, mostly related to gastric indigestion, gastroenteritis, chronic gastritis, as follows: 1, indigestion, gastroenteritis, gastric power deficiency: need to choose lactobacillus tablets and other drugs to regulate under the diagnosis of the physician. In addition, in the daily diet should also pay more attention, try not to choose cold, greasy food, because this kind of food is difficult to digest, often leading to very obvious stomach acid and accompanied by nausea, vomiting symptoms; 2, chronic gastritis: such as climate change, environmental changes, irregularities in life, a long time to eat irritating food, leading to gastritis triggered by stomach acid, nausea, vomiting, should actively go to the hospital to receive Electronic gastroscopy examination, under the diagnosis of the physician, for the disease to take appropriate drugs, can effectively control the condition.