Bruising in leukemia is mostly manifested as subcutaneous bleeding, with bright color in the early stage and flaky bruises in the later stage, which can be found in various parts of the body, mostly due to minor bumps and other reasons. 1. Bone marrow hematopoietic function of leukemia patients is inhibited, and thrombocytopenia may occur. Platelets can maintain blood clotting in the human body, and when their number decreases, the patient will bleed easily, and bruises will appear after minor bumps or abrasions. The color is bright in the early stage, and as the bruise gradually dissipates, it may show flaky blue skin, and may appear in many parts of the body. 2. In addition to bruising, leukemia patients may also have symptoms such as fatigue, weight loss, anemia, low-grade fever, frequent or severe nosebleeds, increased menstrual periods, frequent infections of the lungs, urinary tract, gums, or around the anus, bone or joint pain, and enlarged lymph nodes in the neck, armpits, groin, or above the collarbone. Leukemia cannot be diagnosed solely on the basis of bruises, but should be combined with other symptoms and laboratory tests. It is recommended to go to the hospital in time to get a clear diagnosis of the disease and timely treatment to avoid delays.