Bones protruding from the side of the toe may be caused by heredity, bunion deformity, degenerative bone and joint disease, inflammation, etc. If it is heredity, it is a normal phenomenon. 1. Heredity: Heredity is an important factor in the development of bunion, and it is common in adolescent patients. Patients with a positive family history often have a prominent bone on the outside of the big toe, which is a normal phenomenon. 2. Bunion deformity: Usually the toe bone of the big toe is protruding, which is one of the more common deformities. It is one of the more common deformities. It is mainly due to chronic strain injury, congenital development and other reasons that lead to the relaxation of the joint capsule and instability of the interphalangeal joints, which is mainly manifested by the protruding of the lateral bone of the big toe. 3. osteoarthritic degenerative lesions: middle-aged and old people are prone to osteomalacia, osteoarthritic degenerative lesions, accompanied by symptoms of osteomalacia in the joint parts of the big toe, with the bump on the lateral bone of the big toe as the main clinical manifestation. 4. Inflammation: Psoriatic arthritis, rheumatoid arthritis, gout and other diseases may cause foot deformity and bunion. If there is a bone protruding from the side of the toe, i.e. bunion, it is recommended that the patient consult a doctor in time, under the guidance of the doctor, combined with the relevant examination results, to identify the cause of the disease and then carry out targeted treatment, so as to avoid delaying the condition.