Flat feet, also known as flatfoot deformity, generally do not need to be corrected in asymptomatic people, and those with obvious symptoms or deformity can be corrected through conservative treatment and surgical treatment. 1. Conservative treatment: If the deformity is mild, it can be corrected by wearing orthopedic braces or orthopedic insoles, etc. Functional training should be carried out under the guidance of doctors, and weight bearing should be reduced in daily life, so as to change the bad life style. 2. Surgical treatment: the serious flatfoot deformity can be corrected by subtalar joint fusion, heel navicular bridge resection and so on. It is suggested that patients with flat feet can prevent the progress of flatfoot deformity by strengthening the foot muscle exercise, such as picking up marbles or stones with toes and practicing walking on tiptoe. Flat feet need to go to the hospital as soon as possible for treatment if there are symptoms of foot discomfort, long-term untreated may induce osteoarthritis of the hip and knee joints and other diseases.