Having chronic facial pain that is sharp or dull is a symptom of TMJ disorder.
Usually, tight and tender bands can be felt in the masseter muscle (you can feel this muscle just above the angle of the jaw as you clench your teeth).
In order to alleviate muscle pain due to TMJ, treatment need to include the muscles responsible for jaw movements but the treatments must include muscles of the neck, too.
Head and neck posture must be corrected.
Mouth guards and splints might be beneficial.
Try massaging the various muscles that may be involved. Probe all of the muscles of the face, shoulders, and back of the neck.
Apply moist heat or cold packs on the face, take vitamin supplements, and exercise daily.