Hallux rigidus (hallux limitus)  What is Hallux rigidus? Hallux rigidus is the development of arthritis in the 1st metatarsal phalangeal joint, which over time leads to limited range of motion and pain. Hallux rigidus is a progressive condition, so over time you will develop more joint stiffness and pain.  What  causes hallux rigidus? Typically hallux rigidus is caused by a biomechanical/structural …