Morning fasting nausea and acid vomiting are considered to be related to conditions such as poor diet, early pregnancy, and gastrointestinal disorders. In case of pregnancy, it is usually enough to pay attention to diet and no special treatment is needed. If it is improper diet or gastrointestinal disease, in addition to dietary regimen, medication should be given. Common causes and related suggestions are as follows: 1. Improper diet: such as eating too much stimulating food for dinner, not eating in time after waking up in the morning, etc. Due to excessive consumption of indigestible food the night before, stomach acid is over-secreted and stimulates the gastric mucosa, which in turn leads to nausea and acid vomiting. If you do not eat in time in the morning, the slow secretion of stomach acid can also lead to the symptoms. It is recommended to avoid greasy and stimulating food for dinner, and drink a glass of honey water or light salt water after waking up in the morning to reduce the secretion of stomach acid; 2. Early pregnancy: women of childbearing age with morning fasting nausea and acid vomiting symptoms should consider the possibility of early pregnancy. Due to the elevated hormone level in pregnant women, gastric acid secretion is reduced and gastric emptying time is prolonged, making it easy to experience nausea and vomiting. It is recommended to eat a light diet with nutritious and easy-to-digest foods, such as dairy products and eggs; 3. Gastrointestinal diseases: commonly found in patients with gastroesophageal reflux disease, gastric ulcer, chronic gastritis and other diseases. In the fasting state, excessive secretion of stomach acid can cause damage to the mucosa, leading to nausea, vomiting and other symptoms. In addition, factors such as improper diet, bad mood or excessive staying up late can aggravate the symptoms. It is recommended that oral medications that inhibit stomach acid can be taken to regulate the treatment, such as omeprazole.