The most common causes of hallux valgus are congenital factors, but there are also acquired factors, such as trauma, neuropathy, tibialis posterior tendon insufficiency, etc. If hallux valgus occurs, it is recommended to seek medical treatment in time. 1. Congenital factors: due to some congenital genetic abnormalities, it will lead to the increase of tension of the outer muscles innervating the calf, and the inner muscles are not strong enough, which will lead to the pulling of the outer muscles of the foot to turn outward. Or the fetus is squeezed in the uterus, which causes abnormal development of the fetus and the phenomenon of foot exostosis. 2. Trauma: If the patient suffers from fracture or impaired tendon function and malformation healing occurs, it is also easy to induce clubfoot. 3. Neurological lesions: diseases such as poliomyelitis and cerebral palsy can lead to neurological lesions, which in turn can cause clubfoot. 4. Inadequate function of the posterior tibial tendon: the main function of the posterior tibial tendon is to resist the other muscles in the foot to turn over, the decline in the function of the posterior tibial tendon will cause insufficient resistance, which in turn causes the foot to turn over. The causes of clubfoot are many, and may also be related to congenital absence of the navicular bone, tumors and other diseases, it is recommended to go to the hospital in time to find out the cause of the disease by the doctor, and carry out targeted treatment.