Hi,
Welcome to the ehealthforum and I am glad to help you out.
TMJ pain disorders usually occur because of unbalanced activity, spasm, or overuse of the jaw muscles. This causes inflammation of the jaw joint and hence such symptoms.
You can apply warm compresses to the joint and take anti inflammatory pain killer drugs after consulting your doctor. A physical therapist can also be approached as craniosacral therapy to relax the muscles and fascia of the jaw is very helpful in relieving the pain.
Other than that, you can use the day and night splints. In addition, biofeedback instrument such as a biofeedback headband also helps at night. Reconstructibe dentistry, arthrocentesis (joint irrigation), surgical repositoning of jaws and oral surgery (as last resort) can also be tried.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.