I have a stiff toe joint and it is not hallux rigidis, what could be the cause?

If not: Other possible etiologies can include swelling from injury (like jamming a thumb), gout, fracture, arthritis, or infection. However, the most common cause is still rigidus. Recommend full evaluation by a podiatrist.

Hallux limitus: Could be hallux limitus which is slightly different then hallux rigidus. Functional hallux limitus means you can bend your toe fine when you're not bearing weight; however, when you bear weight during propulsion in gait, the joint locks up and is not flexible enough for normal function. This is usually due to elevation of the 1st metatarsal head, which limits the motion.

Many possibilities: Your pain could be as a result of many different things. A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. Causes of pain may include: trauma (fracture, sprain, arthritis), infection, metabolic conditions (gout), musculoskeletal or biomechanical abnormality and neurologic conditions (neuropathy).