hallux rigidus
Osteoarthritis of the metatarsophalangeal joint of the big toe (hallux rigidus) is the most common. It manifests itself by mechanical pain of the 1st metatarsophalangeal joint, created by the stepping process, and by progressive stiffening of plantar extension and then flexion of the first ray.
Sometimes there is dorsal exostosis accompanied in some cases by bursitis.