Medically, the big toe is referred to as the hallux. Hallux limitus is a progressive arthritic condition that limits the motion and function of the hallux, usually at the big-toe joint. The big-toe joint is located where the first metatarsal bone and proximal phalanx meet, or at the base where your foot and toes meet. Hallux limitus affects the dorsiflexion (upward) motion, and over time, the condition can worsen and lead to the condition hallux rigidus, or no motion of the big-toe joint at all.