The 90-year-old man lost hematopoietic function, consider and blood system diseases, if necessary, consider blood transfusion for treatment, abdominal distension can not eat can perform gastrointestinal nutrition or nasal feeding. The 90-year-old man lost hematopoietic function, first of all, consider the existence of blood system diseases, such as patients with aplastic anemia or leukemia and other problems, at this time the hemoglobin value is lower than 60 grams per liter, you can consider the treatment of blood transfusion, so that the patient’s condition is stabilized. Iron, vitamin C and other medications can be given to treat the condition if necessary. The occurrence of abdominal distension is related to blood system diseases, this situation also needs to exclude whether the patient has liver function damage, or cirrhosis ascites and other problems, not able to eat, can be infused to supplement amino acids, fat milk, etc., can also be given nasal feeding nutritional solution. If there is loss of hematopoietic function, it is recommended to find out the primary disease that leads to the hematological system, and it is recommended to consult the hematology department of regular hospitals for treatment.