If the mouth is sour immediately after eating, you can eat more foods such as yam and barley at ordinary times, or use medicines such as spleen pill, omeprazole and thioglycollate to improve it. Most of the acidity in the mouth after eating is caused by poor transport of the spleen and stomach, so it is necessary to adjust the function of the spleen and stomach, and these people can eat food with the role of spleen in the usual diet. The yam itself has the effect of strengthening the spleen and stomach, often eat yam can improve the function of the spleen and stomach, promote food digestion. Job’s tear has the effect of clearing heat and detoxifying, dispelling dampness and water, benefiting qi and strengthening the spleen, and regular consumption can improve the function of the spleen and stomach. Jian spleen pill is mainly used to treat weakness of the spleen and stomach, and also has the effect of strengthening the spleen, eliminating food and resolving stagnation. Some people have sour mouth immediately after eating, which is caused by excessive secretion of stomach acid. These people can use omeprazole for improvement. Omeprazole can inhibit proton pump activity and reduce secretion of stomach acid, so it can relieve the symptoms of excessive stomach acid. Aluminum thioglycollate can protect the gastric mucosa from the corrosion caused by gastric acid and promote the repair of gastric mucosa.