“Is massage good for TMJ?”

It can’t do any harm. It can give temporary relief.

If it is a facial massage it can help loosen the muscle but not much more

Massage of muscles that are tender/sore can be helpful for patients who have myofascial pain (muscle pain) that is one of the more common symptoms of temporomandibular joint disorders. Joint specific disorders (arthritis, degenerative joint disease, disc malposition) require more joint specific intervention, although massage may assist with the associated muscle pain, limited opening. There are a myriad of interventions that are applied to TMJ disorders, and a clear diagnosis and determination of causes is essential if treatment is to be tailored to the patient specifically. See an Oral and Maxillofacial surgeon.

P. Cary

Massage can reduce muscle tension which is a precipitous factor in TMJ dysfunction. So the answer is yes.

It can definitely help if you massage the muscles of mastication.