A nervous stomach may be due to vagus nerve excitation, gastritis or gastric ulcer and stomach spasm. 1. Vagus nerve excitation, when the spirit is in nervousness, the vagus nerve of the gastrointestinal tract will be excited and lead to a large amount of secretion of digestive juices, which will then lead to reflux of intestinal fluids and intestinal contents, which will stimulate the gastric mucous membrane, resulting in gastric pain, gastric acidity and other gastrointestinal symptoms. 2. Gastritis or gastric ulcer and other diseases, due to the nervousness caused by the stimulation of the vegetative nerve function, which in turn causes spasm and contraction of blood vessels, further aggravating gastritis and other symptoms. 3. Stomach cramps, when eating too much food, or after eating spicy and stimulating food, stomach cramps will be manifested when nervous after meals. For severe cases, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment.