There is no specific time, and the treatment of stomach diseases requires long-term conditioning of the stomach. Egg skin has a certain effect on treating stomach diseases. Modern research has found that the main component of eggshell is calcium carbonate, accounting for about 93%, which has the function of making acid. The ground powder enters the stomach and covers the surface of inflammation or ulcer, which can reduce the concentration of gastric acid and protect the gastric mucosa. Eggshell also contains 3.2% protein, 1.0% magnesium carbonate, 2.8% calcium phosphate and magnesium phosphate, all of which are beneficial to health. In addition, the eggshell inner membrane has a good protective effect on stomach diseases, especially peptic ulcer. Many famous Chinese medicine practitioners in the Qing Dynasty and modern times like to use it as a medicine introduction, and the prescription is called Fengyi. In the traditional Chinese medicine for treating gastropathy, adding 1 ~ 2 phoenix clothes can improve the curative effect. To sum up, it is generally a safe and feasible folk therapy. As the title, it is aimed at the situation of "hyperacidity", which is mainly seen in chronic gastritis and gastroduodenal ulcer. Its main symptom is stomach trouble, with obvious heartburn and noisy feeling. The so-called "baking" was required in ancient times to be placed on tiles and processed with fire. Modern families can wash and break eggshells, fry them in an iron pan with slow fire (don't burn them), and then grind them into powder. The more detailed the study, the better.