Flatfoot refers to a low flatness or absence of the normal arch, or a collapsed arch. It is important to note that flat feet are not the same as flatfoot syndrome, and not all flat feet require treatment. If a person with flat feet has a combination of pain and other symptoms, it is called flatfoot syndrome and may require treatment. The main manifestations are pain and swelling. The pain is usually located on the inside of the plantar aspect of the foot, below the medial ankle, and is aggravated after prolonged standing or walking, and may appear to be progressively worse. In some patients, the pain may also be located near the lateral lateral ankle joint. The swelling is mainly found in the navicular tuberosity of the foot and below the medial ankle. Treatment: Early detection of flatfoot syndrome is very important and should be followed by active examination and treatment to clarify the cause and prevent possible irreversible lesions of the bone and joint. Foot pads are a more commonly used non-surgical treatment to relieve pain and also support the arch of the foot, allowing the dislocated joint to improve its position. In addition, wearing shoes with hard soles can achieve strong support for the sole of the foot, and shoes with rocker soles can reduce stress on the ankle during walking. However, orthotics such as foot pads cannot completely correct the abnormal position of the talus and fully restore the normal arch. For those with severe deformities, if non-surgical treatment fails, the appropriate surgery can be chosen according to the type of lesion. Prevention: Perform functional exercises of the intrinsic and extrinsic muscles of the foot, such as foot-plantar walking, plantar flexion exercises, and heel lifting and external rotation exercises. At the same time, choosing shoes with good arch support and avoiding standing for too long a period of time are of some significance to the prevention of flatfoot. Simple diagnosis of flatfoot: simply walk barefoot from a wet floor to a dry floor, look at the footprints on the floor and compare them with the picture below to know if you have flatfoot. If your footprint is similar to the first or third picture, it is recommended to go to a regular hospital for foot and ankle surgery and consultation.