Patients with leukaemia often have symptoms of sternal pressure pain, especially those with acute leukaemia. The reason for this is that patients have a large number of proliferating leukaemia cells in the medullary cavity, which compress and destroy the adjacent bone, infiltrate the periosteum, or cause an increase in pressure in the sternal cavity, and because the anatomical location of the sternum is more superficial, the sternal wall is thinner, and the sensory nerves there are richer and more sensitive, so sternal pressure pain is likely to occur.