Foot patch is mainly used to regulate body function, assist in the treatment of some diseases, and can alleviate the symptoms of organic injury. For example, knee sprain: it may be ligament tear or meniscus injury, and foot patch treatment is somewhat weak. For example, ankle sprain: it may be that ligament strain is not torn, and foot patch has the effect of detumescence and pain relief. If there is a tearing or avulsion fracture or the fracture effect is poor, it is easy to be misdiagnosed and delay the illness. In short, the best hospital carries out the diagnosis and treatment of organic diseases, and the foot patch is used as an auxiliary treatment.