A big toe is a deformity in which the bunion tilts outward at an angle greater than 15 degrees physiologically. The main cause is a dislocation of the joint at the base of the big toe, causing the bunion to bend outward and causing the bunion bone to protrude outward. The pain will come along with the permanent deformation of the toe. The initial clinical symptoms are pain and swelling at the elevation of the head of the first metatarsal bone, local skin irritation and inflammation, and even epidermal ulceration. When the pain in the entire sole of the foot increases, the patient will be unable to wear shoes, resulting in a great impact on daily life and walking. Symptoms 1. bunion deformity, local pain, affect walking, bursitis, local ulceration, infection. 2, foot bunion, rotational deformity. The second toe extrudes toward the back, forming a hammer toe. Forefoot widening. 3.The skin of the metatarsal surface of the second and third metatarsal heads increases due to weight bearing, forming callus. 4. The skin of the protruding part of the first metatarsophalangeal joint thickens and even becomes red and swollen to produce bunions. The severity of foot pain in bunions is not proportional to the degree of deformity. Sometimes the pain is not obvious when the deformity of the bunion is severe. However, most patients with severe deformity will have varying degrees of pain. The bunion pain is mainly due to the protruding part of the metatarsal head, which is squeezed and rubbed by the shoe upper for a long time, making the local skin thickened and bony, and can produce bursa and bursitis under the skin in this area, causing redness and pain. In addition, the second toe protrudes toward the back of the foot and often rubs against problems such as corns, which can also cause pain. Treatment Surgical treatment: Used for those with severe pain or deformity. Surgery: cut the foot bunion and transplant it to the lateral side of the first metatarsal neck; remove the lateral subunit; remove the bursa and the bony cyst and overlap the suture of the medial joint capsule to tighten it to correct the inversion of the metatarsal; removal (Kellers surgery): for those with severe osteoarthritis. Principles of medication 1. For most patients, non-surgical treatment is not required. 2, for a small number of patients need to perform surgical treatment, postoperative antibiotics to prevent infection, according to the specific circumstances of the patient, choose different antibiotics. Postoperative supportive and symptomatic treatment should be given. Modified Keller surgery for mother ectropion Modified Mc Bride combined with Simmonds surgery for bunion deformity.