Bone marrow aspiration may cause pain at the puncture site, bleeding, hematoma and other hazards, but it can gradually get better and usually does not affect human health. 1. Bone marrow extraction requires the use of a bone marrow puncture needle to pierce the skin and then penetrate the bone surface to enter the bone marrow to extract bone marrow fluid, so bone marrow extraction will lead to pain at the puncture site, which is usually gradually relieved within a week or so. 2. There are capillaries and small blood vessels in human skin and subcutaneous tissues, the puncture needle may puncture the blood vessels and cause bleeding, normal people can stop bleeding soon after compression to stop bleeding. If the patient has severe thrombocytopenia or coagulation disorders, it may lead to heavy bleeding or even hematoma formation at the puncture site. The puncture hole for bone marrow aspiration usually heals in about three days, and even if there is bleeding or hematoma, the bleeding can be stopped well by compression hemostasis treatment, and the hematoma will be gradually absorbed. Bone marrow aspiration should be performed by a licensed physician.