What is the diagnosis when you suffer from pain in your left jaw joint? it usually occurs when i eat?

TMJ: Usually tmj. Temperomandibular joint dysfunction. Could be arthritis due to other cause or be unrelated to the joint ( your parotid gland and several important nerves are close by.).

Varies: Need clinical and x-ray image examination to be much help. Certainly it is your joint/muscle/ligament/disc complex , but need more hands-on evaluation. See your Dentist. Have bite checked. Do you have wisdom teeth in contact, are you missing teeth, are you opening unusually wide, chewing very tough or hard foods (sugar cane ?) ??Good luck.

TMJ - TMD: Temporo-mandibular disorder is the second most frequent cause of orofacial pain after dental pain. Headache, earache, sinus pain, neck pain and jaw pain are the common symptoms. Proper diagnosis is the key to successful treatment. See Orofacial Pain practitioner for a consultation and treatment options.

TMJ/TMD: TMJ. Classic symptoms. Complex problem. See a TMJ expert. 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.