Horseshoe refers to observing the shape of the patient's feet when standing and walking. If you see a patient standing with his toes touching the ground and his heels dangling, it looks like a horseshoe; When walking, toes can't be raised, and they are often kicked during foot swimming. Toes touch the ground first, and then feet touch the ground. After examination, it can be seen that there is obvious plantarflexion in the front of the foot, often accompanied by fovea and short achilles tendon, and the foot can not bend back at all. This is horseshoe foot, which often indicates polio sequelae, polyneuritis and other diseases. It is suggested that patients take appropriate treatment, and the effect is still good.