The navicular abdomen is commonly seen in chronic wasting diseases, as well as other conditions, as follows: 1. chronic wasting diseases: for example, severe tuberculosis, severe hyperthyroidism. 2. other conditions: if the patient has removed most of the small intestine, the navicular abdomen can also appear, and some patients are in the middle and late stages of malignant tumors. After discovering the symptoms, it is necessary to go to the hospital as soon as possible to improve the relevant examination to clarify the cause. Generally, it is necessary to check blood routine, C-reactive protein, liver function, hepatitis B five, infection four, chest and abdomen CT, and sometimes tumor markers. If poor nutrition is considered to be the cause, active nutritional support therapy is required. Commonly used drugs include compound amino acids, fatty milk, multiple trace elements, vitamins, etc. Sometimes human albumin transfusion is also required. If the patient is able to eat, he or she can consume nutritious substances such as fresh fish, shrimp and leaner beef.