Usually regular bone marrow aspiration does not cause some obvious harm to the body. However, if it is not operated properly, it may cause localized bleeding, infection and other hazards to the body. 1. Local bleeding: most of the bone marrow aspiration needs to utilize the bone marrow needle, if it is not operated properly, it may touch the small blood vessels in the surrounding area, resulting in blood vessel damage and bleeding, but this situation, the general incidence is not high. 2. Local infection: The location of the bone marrow aspiration puncture may cause infection, although there will be a very small wound locally after the puncture. If you don’t pay attention to local cleanliness and hygiene, premature touching of water may induce infection, such as local redness, swelling and so on. In general, regular bone marrow aspiration will not cause much effect on the body, and bone marrow aspiration can also help to diagnose certain blood system diseases. Bone marrow aspiration is performed by professionals in an aseptic manner to avoid infection.