The common causes of bruises on the feet are generally the following First, the bruise on the foot is caused by local capillary rupture and blood infiltration into the subcutaneous tissue space when the patient accidentally bruises during strenuous exercise. The elderly patients due to the local capillary elasticity is poor, if accompanied by local vascular pressure elevation, resulting in capillary spontaneous rupture, blood infiltration into the subcutaneous tissue, manifested as the bruising symptoms of the foot. The most common cause of purpura is the metabolic disorder of estrogen level in young female patients, which can manifest as multiple bruises on the feet without trauma. The symptoms of expected bruising can be improved by applying local ice and taking oral vitamin drugs. Fourth, patients with abnormalities in their own coagulation mechanisms, such as reduced platelets, can also cause recurrent foot bruising.