The most common type of toe outgrowth is the bunion, also known clinically as a bunion deformity. Bunion deformity is a more common clinical forefoot deformity, and its causes are mainly due to the following factors. 1. Genetic factors: bunions are hereditary, especially in women, and most have an obvious family history, which may be related to abnormalities in genes and collagen synthesis. 2. Chronic injuries, strain factors: most commonly seen in patients who walk for a long time or often carry heavy loads. The toes are prone to deformity due to long-term stress and compression, resulting in bunions. 3. Inappropriate footwear: Women’s high-heeled shoes or pointy shoes that are too sharp in the front can cause bunions to gradually turn out and form corresponding deformities under the action of the shoes, or people who have high risk factors for bunion should pay more attention to the role of this factor, which can lead to the early occurrence of bunion or aggravation of bunion deformity. 4. Unexplained: The bunion may be accompanied by other toe deformities, such as bunion with high arches, or some navicular or metatarsal deformities. In most cases, bunion is usually treated conservatively in the early stages, such as avoiding high heels, wearing more flat shoes, and having a wide forefoot. When the bunion deformity is more serious, seriously affecting the work and life, and when the pain can also do the corresponding orthopedic surgery treatment.