Why is my jaw locking constantly?

Jaw locking up: If your jaw is locking closed, it generally means that the disc in the jaw joint may be displaced. If your jaw is locking open, that means that the jaw is itself becoming dislocated, which is much less common. For a closed lock that fails to respond to simple measures, it has been shown through many studies that the most effective treatment is TMJ arthrocentesis or arthroscopy, to unlock the jaw.

Out of balance : A balance exists between how your teeth fit together, how your jaw joints work and how the muscles move these. If this is not working properly it can lock (joint dislocated), your teeth may not fit together properly (bite is off) or you may experience muscle pain (headaches, earaches, etc.) check with you dentist and get help or a referral to someone who has experience treating these (years).

Disk out: Jaw joint disk out of position. Locking means advanced TMJ condition. See TMJ expert for advice. Any dentist can be a TMJ expert with the proper training and experience. Most commonly, oral surgeons, prosthodontists, and orofacial pain specialists. Ask your MD, your dentist and your dental society for referrals.

TMJ Displaced Disc: If it's locked closed, it's usually due to a displaced disc in the TMJ jaw joint. See your dentist for unlocking procedure.