Leukemia bruising and normal bruising can be compared in terms of occurrence mechanism and recovery time of the disease. 1. Occurrence mechanism: leukemia bruises are mainly caused by insufficient platelet count, abnormal platelet function and coagulation dysfunction. Leukemia bleeding tendency is obvious, usually light touch or no trauma can appear obvious bruising. Ordinary bruising may be caused by increased vascular permeability. Ordinary bruising usually has a history of trauma, and the bruising only appears at the site of injury. 2. Recovery: The recovery of leukemia bruise needs to improve the cause of bleeding, such as active treatment of leukemia, platelet supplementation, etc. Otherwise, the bruise may always exist, and the area of leukemia bruise is large, ordinary bruise may be gradually absorbed in 3 to 5 days. If you find unexplained skin bruises, you should seek medical advice, improve relevant examinations and get treatment as soon as possible.