How do i improve my jaw locking from grinding?

Jaw locking/grinding: Not sure your question is entirely clear, but if your jaw is locking closed, that generally means that the disc in the jaw joint is displaced. If it remains displaced for a long time, that can lead to TMJ arthritis, which causes a grinding noise. You might benefit from splint therapy, but it also sounds like you might be a good candidate for TMJ arthroscopy in an attempt to eliminate the locking.

Difficult on own: Your jaw may be locked, which means that the articular disk that joins the upper and lower jaws (maxilla and mandible, ) may be out of place. It may be displaced forward and does not allow the mandible to get back to its comfortable position and the lower teeth therefore do not come together. You should see a tmj/tmd specialist to provide the necessary answers and therapy.

Not DIY: You need help, you can't do this yourself. Please call your Dentist for an appointment. An Orthodontic consultation may also be in order.

Complicated: Complicated jaw problem. See a TMJ specialist to manage this problem. 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. Good luck.