The common causes of bone protrusion and pain at the bunion of the patient’s foot include local trauma and bunion deformity, as follows: First, local trauma: during the process of exercise, the patient can have the bunion bone protrude and cause local swelling and painful symptoms, accompanied by limited movement of the first metatarsophalangeal joint, which can be restored to normal force line and relieve painful symptoms after manual reset, the patient needs to cooperate with rest The patient needs to rest, brake, avoid weight bearing on the affected limb, and generally 3-4 weeks will gradually repair. Second, bunion deformity: prolonged wearing of pointed shoes or congenital factors can lead to bunion, the force line changes cause the base of the bunion to bulge medially, the first metatarsal head will also bulge medially, the patient will have local pain, limited activities and other clinical symptoms, and even the formation of local bunions, and repeated friction with the shoe upper.