The main symptoms of dyspepsia (poor appetite) include recurrent abdominal pain, bloating, nausea and vomiting, loose stools and pallor. Treatment should be chosen according to the cause of the disease, the main causes include digestive system diseases, acute infections and chronic inflammation, metabolic abnormalities, etc. Most of the patients are treated with medication and life therapies, such as a balanced diet and proper exercise, and a few need surgery. 1. Diseases of the digestive system: including peptic ulcer, acute and chronic gastritis, acute and chronic hepatitis, biliary tract diseases, etc. Symptoms mostly include anorexia of greasy food and drink, abdominal pain, belching (hiccups) and acid reflux, and the treatment relies on medicines such as antacid magnesium hydroxide, digestive aids and digestive enzymes, etc., and also attaches importance to the general measures, such as proper rest and a balanced, nutrient-rich diet. 2. Acute infection and chronic inflammation: such as tuberculosis, inflammatory bowel disease can lead to varying degrees of loss of appetite, often accompanied by fever, the treatment should be timely medical checkups, can follow the doctor’s instructions to use anti-infective and anti-inflammatory drugs, such as aspirin and so on. 3. Metabolic abnormalities: imbalance of various trace elements and electrolyte disorders can cause loss of appetite, such as hypercalcemia, hypokalcemia, severe hyponatremia, etc., which are often accompanied by different mental, excretory and weight abnormalities. Such conditions should be corrected while looking for the primary cause of the disease, and medication should be chosen for different abnormalities. Poor appetite is also seen in chronic systemic diseases, cancer and tumors, adverse drug reactions, etc. The presence of this symptom should not be taken lightly, and timely consultation and treatment should be provided to avoid delays.