Hematopoietic stem cell transplantation is a particularly complex treatment, and patients with low immunity after transplantation should pay special attention to self-management and also to outpatient follow-up. The precautions after hematopoietic stem cell transplantation are as follows: 1. Follow-up time: We require weekly follow-up visits preferably within 3 months, especially to pay attention to the concentration of immunosuppressive agents, such as cyclosporine and tacrolimus, and to adjust the outpatient visits according to the medical advice of the attending physician. After the transplantation, we ask that you should contact your doctor proactively for a follow-up visit at 1 month, 2 months, 3 months, 6 months, 9 months and 12 months. Patients should especially develop the habit of self-examination of the body, paying attention to the chest and extremities daily for rashes, bleeding spots, and swollen lymph nodes. If there is, for example, fever, diarrhea, rash or even breath-holding, etc., special attention should be paid and urgent medical attention should be sought. After 3 months of transplantation, the duration of outpatient visits can be extended appropriately according to medical advice.2. Life: transplant patients should pay special attention to keeping the room ventilated, dry and clean in their daily lives, and should wear masks and wash their hands frequently. Pay attention to the hygiene of the diet, try not to eat seafood, because it is easier to cause allergies. In particular, patients with allergies should not blindly take supplements, try to eat less or no fried and spicy food, and during the period of taking cyclosporine and tacrolimus, try to reduce the consumption of grapefruit and other foods that will affect the concentration of cyclosporine. Try to avoid contact with patients with viral infections, such as those with herpes zoster, herpes simplex, or those with influenza. The first thing you should do is to avoid contact with small animals and children who are receiving polio vaccination, use less and less flowers, don’t go swimming, etc., don’t go to crowded places, and try not to dine in restaurants. 3. appropriate exercise: encourage appropriate exercise after transplantation, pay special attention to increase the amount of exercise in moderation, don’t super strenuous exercise, and try to avoid taking public transportation.