Myelosuppression is one of the common side effects after chemotherapy, manifested as a decrease in the number of peripheral blood red blood cells, white blood cells and platelets, causing infection, bleeding, anemia and other related clinical manifestations. The main points of care for patients with myelosuppression are as follows: 1. Red blood cell decline: symptoms such as anemia and hypoxia usually occur, and these symptoms should be avoided as much as possible. 1. Avoid pressure increase: try to avoid movements that cause a significant increase in chest pressure and abdominal pressure such as forceful coughing and defecation; 2. Slow movements: instruct patients to move slowly and gently when getting up or squatting and getting up, and avoid too 3, pay attention to rest: reduce the time of activity, pay attention to rest. 2. Decrease in white blood cells: immune function decreases and infection easily occurs, so the main attention is to avoid infection. 1. closely observe the easy-to-infection areas: for example, the mouth, throat, perineum, and perianal area for redness, swelling, heat, pain, etc.; 2. keep clean: encourage patients to take a shower every day, sit in the bath after stool, and keep the perineum and perianal area clean; 3. keep bowel movements smooth: prevent constipation from damaging the intestinal mucosa and causing infection; 4. 4, pay attention to dietary hygiene: do not eat cold, overnight food, tableware should be fully sterilized; 5, strengthen oral care: rinse more after meals to avoid oral disease caused by infection. Third, thrombocytopenia: it will affect the coagulation mechanism, so mainly avoid trauma formation. 1, reduce bed activities: avoid falls, falls, platelet count if lower than 20 × 10^9/L, the patient should be instructed to absolutely bed rest; 2, try to avoid invasive operations: that is, invasive operations that pierce the skin, if it is unavoidable, strictly implement the principle of aseptic operation. In addition, observe the color and properties of the patient’s stool, urine and sputum, and pay attention to the changes in the patient’s mental, sensory and motor functions, as well as changes in the respiratory rhythm.