Therefore, when a patient has a significant drop in hemoglobin, we need to actively consult a doctor, improve the routine occult blood, tumor series, lung CT and other related examinations to clarify the diagnosis, and take appropriate treatment according to the diagnosis. If the patient’s hemoglobin drops due to gastrointestinal bleeding, we can use acid-suppressing and hemostatic drugs, and clarify the cause of gastrointestinal bleeding, such as tumor-induced gastrointestinal bleeding, we can consider surgery for treatment. For peptic bleeding due to peptic ulcer, we can give acid suppression and hemostatic treatment. If the patient is anemic due to tumor, we can give surgical treatment, radiotherapy, chemotherapy, etc. according to the condition.