If there is a bruise on the foot for no reason, the following treatment measures should be taken: 1. Apply medication with blood activating effect on the bruised area, such as safflower oil, Huangdao Yi wine, or Yunnan Baiyao spray, but do not massage it during the process of application. 2. After the above treatment, the patient should go to the orthopedic department of a secondary or higher hospital as soon as possible to clarify the cause of the bruise, that is, subcutaneous bleeding, and to deal with it. 4. If, after the consultation, it is clear that the bruise is caused by trauma such as extrusion or friction, the patient can carry out the above treatment. If there are blood or vascular related lesions, corresponding medical etiology treatment is required.