If you go to bed and find bruises on your body, you should consider the platelet problem and the coagulation problem, you should go to the hospital to check the blood routine to see the platelet situation, you should also check the coagulation image to see if the coagulation function is abnormal, the following diseases will lead to the above symptoms: 1, drug secondary bruises, if you take an overdose of aspirin drugs before going to bed will lead to capillary bleeding and cause bruises on your body. 2, if you take an overdose of aspirin drugs before going to bed will lead to capillary bleeding and cause bruises on your body. If the patient has an allergic disease, such as allergic purpura, there will be a bruise on the body. 3, if the patient has been taking anticoagulants such as warfarin for a long time, there will be a bruise on the body after waking up. 4, abnormal liver function or platelet abnormalities, there will also be a bruise on the body after waking up.