Stomach acidity and nausea can be treated by taking medicines that inhibit stomach acid and protect the gastric mucosa, and some people need to use medicines such as Xiangsha Liu Jun Zi Tang and Huizi Lizhong Pill. When stomach acid and nausea occur, most of them are caused by the stimulation of gastric glands caused by food, resulting in excessive secretion of gastric acid, so they can be treated by taking drugs to inhibit gastric acid. Drugs that inhibit gastric acid mainly include H2 receptor blocking, proton pump inhibitors, such as cimetidine, ranitidine, famotidine, omeprazole, lansoprazole and so on. When the gastric mucosa is in a healthy state, the invasion of gastric mucosa by gastric acid will be smaller, once the protective barrier of gastric mucosa is damaged, gastric acid will be more likely to cause invasion of gastric wall and therefore induce nausea, and these people need to be treated with medications to protect the gastric mucosa, such as colloidal bismuth pectin, bismuth potassium citrate, and aluminum thioglycollate. Some people often have stomach acidity and nausea, which is caused by the weak factors of spleen and stomach, and can be treated with traditional Chinese medicines. Xiangsha Liu Jun Zi Tang has the effect of strengthening the spleen and regulating the qi, eliminating food and benefiting the stomach, which not only improves the spleen and stomach dysfunction, but also has a therapeutic effect on gastric ulcer and duodenal ulcer. Pill with Parsleyed Zi Lizhong Pill has the function of warming the middle and dispersing cold, strengthening the spleen and benefiting the stomach, which can help regulate the symptoms of insufficient gastric power and weakness of the spleen and stomach.