Right below my left ear i have some swelling. it pains when i touch that area or move my neck. one month back i had root canal treatment in right jaw?

HMMM?: It is tough to diagnose this over the computer but a guess, with your recent surgery, would be you may have some infectious process like cellulitis or an abscess forming in the area. i would get checked out with your symptoms and history of the recent surgery. God luck.

TMJ trauma: Opening wide for an extended period of Tim during your root canal could cause this. Return to your dentist to evaluate.

TMJ-TMD : TMJ disorder is the second most frequent cause of orofacial pain after dental pain. The common symptom are: headache, jaw pain, neck pain, eye pain, earache. Proper diagnosis is the key for the successful treatment. This disorder will not resolve on its own with home care. Rec.: orofacial pain specialist for evaluation and treatment.