Nutritional megaloblastic anemia, a type of anemia caused by deficiency of folic acid and vitamin B12, is common in elderly patients. The common symptoms of nutritional megaloblastic anemia are: i. Patients show symptoms such as pallor, dizziness and weakness, panic and chest tightness, blurred eyes and ears, insomnia and dreaminess, while severe patients also show emotional and mental changes. Patients’ appetite decreases significantly, and the amount of protein food consumed is very low, and only light food can be eaten. Some patients may also experience numbness in the extremities, which is a result of vitamin B12 deficiency causing changes in peripheral neuritis. After supplementation with folic acid and vitamin B12, the patient’s symptoms start to improve significantly within a week or so, firstly, the appetite improves, then the numbness of the peripheral extremities gradually improves, and finally the hemoglobin concentration starts to increase significantly.