If a patient has pain in the big toe tendon, the causes include tenosynovitis, degenerative osteoarthritis, injury, bunion, etc. The details are as follows: First, tenosynovitis: stenosing tenosynovitis in the area of the big toe can easily lead to pain in the big toe tendon, which will affect the flexion and extension force activities of the big toe in the serious future. Degenerative osteoarthritis: Degenerative osteoarthritis in the big toe area will easily lead to pain in the big toe tendon. Injuries: Tendon and ligament injuries in the big toe area can also cause pain in the big toe tendon. Bunion: Patients with bunion deformity are also prone to big toe pain. Therefore, after a patient experiences pain in the big toe tendon, it is important to consult a doctor to find out the cause of the problem, and to treat the cause to relieve the symptoms of big toe tendon pain. When the pain is obvious, avoid standing for a long time, avoid squatting, running and jumping, so as not to aggravate the pain, you can temporarily take oral non-steroidal anti-inflammatory drugs, with blood circulation drugs to reduce pain.