<s>[INST] I have had pain in my right jaw for 36 hours. It hurts to clench my jaw shut and is sore to open it.  Now I feel pressure on that side and my right ear is sore to the touch.  I thought it was maybe due to stress and I was clenching my teeth at night but now I was thinking ear or sinus problem.  Can that cause such jaw pain and soreness where it is hard to chew and open and close [/INST] Thanks for using Chat Doctor. Read your query. The pain can be due to the TMJ problem, it will aggravate if you have the habit of biting your teeth in the night (usually referred as bruise). It can either be due to the sinus or ear pain. I would advise you to visit your dentist and get it checked for bruise, who will suggest a night guard for you to avoid and correct it. If you have a stressful life, reduce the stress level. Hope this was helpful. Thanks and regards. </s>