What to do if i have tmj and i think i may have tendonitis help me please!?

See below: You may need to see your dentist to have a bite guard made which can help your symptoms.

Find out the cause: There is a balance between how the teeth joints, muscles work together in harmony. When this is out of balance you need to know why. Once the "causes" have been determined, then you can consider a diagnostic phase to be sure they are addressed adequately, then you can be treated, but do a reversible diagnostic phase first.

A few ideas: Depends on symptoms, and cause of symptoms. 3 signs of TMJ dysfunction: joint noises, joint pain & limited oral opening. Self treat with soft diet, jaw exercises, massage, heat/cold, OTC pain meds. A splint or physical therapy would be next. Occasionally muscle relaxants, biofeedback. Xrays are done for diagnosis. Surgery usually reserved for serious symptoms not responsive to other treatments.