Finger bunions can be caused by a variety of reasons, the main causes include purulent dactylitis, trauma, degenerative arthritis and so on.
1. Purulent dactylitis: purulent infection of the subcutaneous tissue of the palmar surface of the terminal segment of the finger, mostly caused by Staphylococcus aureus, accompanied by pain, breakage and pus flow, local tissue necrosis and other symptoms, and in severe cases, it can cause fever.
2. Trauma: mostly due to improper activities of the thumb, caused by the thumb muscle strain, ligament injury and other soft tissue damage, or smashed by objects. It can be manifested as swelling of the thumb, and serious thumb fracture can be caused, accompanied by skin bruising, pain and other symptoms.
3. Degenerative arthritis: degeneration, degeneration, wear and tear, disappearance of articular cartilage caused by various reasons, and subchondral bone capsule cavity change, which ultimately leads to complete destruction of the joint surface and deformity. It mostly involves the distal interphalangeal joints, such as the thumb, which can be manifested as thumb swelling, and can also be accompanied by pain, stiffness and other symptoms.
Thumb swelling can also be seen in other causes, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease, timely targeted treatment.