Toe flexion and extension should avoid strenuous exercise, if accompanied by pain or inflammation, should promptly seek medical examination, treatment methods include physical therapy, surgical treatment and drug treatment. The causes of the disease mainly include hammertoe, acquired long-term extrusion, congenital deformity of the interphalangeal joints, and neurological injuries. 1. Hammer finger: conservative treatment is usually adopted, such as strict external fixation in the straight position, which usually requires fixation for about one to one and a half months, and most of them can be healed, while for the ones that cannot be healed, it is necessary to carry out the surgical treatment of incision of the tendon to repair it and internal fixation through the needle. 2. Acquired long-term accumulation of pressure: the situation does not need to worry too much, most only need to use physical therapy, such as hot compresses, massage, etc., and pay attention to wear loose shoes, avoid strenuous exercise. 3. Congenital deformity of the interphalangeal joints: if the adult patient is the majority of the use of surgical treatment is more effective, if the child patient can be taken conservatively, the need to use over-extension traction, suspension traction, but also to wear a brace to give fixed, to induce its growth and development to a normal position. 4. Neurological injury: it needs to be treated according to the specific cause of the disease, mainly including drug treatment and surgical treatment. For example, traumatic injury can be treated by surgery; if it is caused by diabetes mellitus, first control the blood sugar, and then give methylcobalamin and vitamin B1 to nourish the nerves; if it is caused by autoimmune factors, it can be treated by immunoglobulin and plasma replacement. If the symptoms of inability to straighten the toes appear, after excluding the physiological, should consult the doctor in time to avoid delaying the condition. The use of drugs should be under the guidance of a doctor.