Bruises may be related to trauma, thrombocytopenic purpura, aplastic anemia, etc. They can be removed by cold compresses, hot compresses and medication under the guidance of a doctor. 1. Cold compress: applicable to the formation of bruises within 48 hours, can be wrapped in a towel, ice, on the bruise, low temperature can slow down the local blood circulation, inhibit the formation of bruises, and at the same time play a role in stopping bleeding, pain. 2. Hot compress: applied to the formation of bruises after 48 hours, hot towels can be used to compress the bruise, high temperature to accelerate the speed of blood circulation, promote the dissipation of subcutaneous bruising, accelerate the disappearance of bruises. 3. Medication: If the bruise exists for a long time, you can use medication under the guidance of the doctor to apply on the bruise, which can reduce swelling and pain, activate blood circulation and eliminate blood stasis, and promote the elimination of bruises. Patients can operate on their own to complete the cold or hot compresses. Bruising may also be caused by other blood system diseases, which need to be treated for the original disease. When choosing medication, you should ask a professional doctor’s opinion and follow the doctor’s instructions to choose the right medication.