It can be used in clinical practice for the treatment of abdominal distension, diarrhea, constipation and abdominal pain in children and adults due to indigestion; it can also be used for the treatment of slowed gastric peristalsis, congestion and edema of the intestinal mucosa due to decreased gastrointestinal function, which is usually called acute enteritis or acute gastroenteritis; it can also be used for the treatment of It can also be used for the treatment of abdominal distension and pain after surgery. The main function of Si Mo Tang is to treat diseases of the digestive system, such as paediatric accumulation of food, wasting, noma, anorexia and poor appetite caused by stomach strength and spleen deficiency; as well as long-term abdominal fullness, diarrhea or constipation caused by the spleen and stomach in the elderly, etc. The main ingredients of Si Mo Tang are composed of herbs with the functions of promoting qi and harmonizing the middle, eliminating food and relieving pain, so it can be used clinically for people of all ages.