Liquid diet is also called fluid diet in clinical practice, mainly eating millet porridge, stomach nourishing porridge, etc., flowing like food, not solid stuff. This diet is usually common in patients with gastrointestinal diseases, such as inflammation in the stomach, when the patient has stomach pain, indigestion and other symptoms, you can consider a liquid diet, and if the patient has poor digestion or accumulation of food, you can also choose a liquid diet, which can reduce the burden on the gastrointestinal tract and relieve the condition. In addition, for patients after major surgery, such as heart surgery, gastrointestinal gastroenterology surgery, etc., it is necessary to resume eating after fasting with a liquid diet to slowly moisten the intestines and stimulate the mucous membrane of the gastrointestinal tract to peristaltic.