According to the degree of arch augmentation and whether it is accompanied by other deformities of the foot, the high arched foot is usually divided into four types. 1, simple high arch foot, mainly the forefoot has fixed plantar flexion deformity, the first and fifth metatarsal uniform weight-bearing. The medial and lateral longitudinal arches of the foot are uniformly increased, and the heel remains in a neutral position, or there is mild valgus. 2, inversion type high arch foot, this type only forefoot medial column, that is, the first and second metatarsal plantarflexion deformity, so that the internal longitudinal arch of the foot is increased. While the external longitudinal arch is still normal. The fifth metatarsal is easily elevated to neutral position when not bearing weight, while the first metatarsal cannot be passively dorsally extended to neutral position due to fixed plantarflexion, and there is a 20-30° inward rotation deformity. Initially, the hindfoot is mostly normal. When standing and walking, the pressure on the first metatarsal head increases significantly. In order to reduce the pressure on the first metatarsal head, the patient often adopts an inversion position for weight bearing, and in the late stage, a fixed inversion deformity of the hindfoot appears. Patients mostly have claw toes, the first metatarsal head protrudes toward the bottom of the foot, the plantar weight-bearing area of soft tissue thickening, callus formation and pain. 3, heel-type high arched foot, common in poliomyelitis, spinal cord bulge. Mainly due to triceps calf paralysis, characterized by the heel bone in dorsal extension, forefoot fixed in plantarflexion position. 4, plantarflexion type high arched foot, mostly secondary to congenital clubfoot after surgical treatment. In addition to the fixed plantar flexion deformity of the forefoot, this type also has obvious plantar flexion deformity of the hindfoot and ankle. The clinical manifestations of each type of clubfoot are not consistent, but all forefeet have fixed plantarflexion deformity. The toes are normal in the early stage, but as the disease progresses, the toes gradually recede backward, the interphalangeal joints are plantarflexed, the metatarsophalangeal joints are excessively dorsiflexed, and there is a claw-like toe deformity, and in severe cases, the toes cannot touch the ground. The dorsiflexion of the metatarsophalangeal joint causes subluxation of the metatarsophalangeal joint, which presses the base of the proximal phalanx on the dorsal side of the metatarsal head and aggravates the plantar flexion deformity of the metatarsal bones, resulting in thickening of the skin at the weight-bearing area, formation of corpus callosum, and even ulceration. For X-ray examination, a frontal and lateral X-ray of the foot under weight-bearing conditions should be taken. M′eary measures the angle between the mid-axis of the talus and the mid-axis of the first metatarsal, and the two lines are continuous when the arch of the foot is normal. If the angle can be measured, it indicates an increased arch. Hibbs measured the angle formed by the median axis of the heel bone and the median axis of the first metatarsal bone, and the normal value is 150-175°. This angle is reduced in high arch deformities. In addition, orthopantomographs measure the heel spacing angle, and if it is <20°, it indicates a hindfoot pronation deformity. Differential diagnosis of hyperkyphosis can be made on the basis of abnormal gait, increased longitudinal arch with claw toe deformity, and increased M′eary angle and decreased Hibbs angle on X-ray examination. However, high arched foot is mostly a deformity caused by neuromuscular diseases, and further examination should be done to find the primary disease or potential pathogenic factors, such as electromyography, cranial or spinal cord CT or MRI examination. Identifying the cause is of great importance in determining the prognosis. Treatment measures for high arched foot Non-surgical treatment Early mild high arched foot can be treated by passively pulling the contracted plantar fascia and shortened intrinsic plantar muscles. In order to relieve the pressure on the metatarsal head and make the weight evenly distributed, a 25px thick felt pad is added at the equivalent metatarsal head in the shoe and 0.3 to 12.5px thicker on the rear lateral side of the sole to reduce the tendency of inversion of the hind foot when walking. However, these measures can only reduce the symptoms, neither correct the high arched foot deformity, nor prevent the deformity from worsening. When the high arched foot has prevented weight-bearing walking, wearing shoes, or progressive aggravation, then surgery should be performed. Surgical methods can be divided into soft tissue release and bony surgery. The surgical method is generally selected according to the patient's age, the type and severity of the deformity, and the state in which the primary disease is located. In principle, soft tissue surgery is performed first, such as soft tissue release of the plantar side of the foot, displacement of the anterior and posterior tibial tendons and posterior displacement of the long toe extensors. If soft tissue surgery still fails to correct the deformity, or if older children have fixed high arched foot deformity, orthopedic surgery can be chosen. Surgical treatment A traditional method is to release the soft tissues on the metatarsal side of the foot by making a longitudinal incision through the medial edge of the foot to expose the soft tissues on the metatarsal side of the foot, first cutting the metatarsal fascia and the long metatarsal ligament, and then stripping the