I am having severe jaw pain along with extreme sensitivity to the upper teeth. Earlier this week the bottom teeth also hurt.  Hot or cold shot severe pain thru my mouth.  I do know that I have TMJ, and problems with my shoulders and neck.  Can any of these be the reason for the pain?  Or is there something else that can cause it.  My sinuses bother me a lot but I havent been checked for allergies, just the diagnosis of TMJ.
Thanks for your query, I have gone through your query. The sensitivity and pain in the teeth can be because of the decay resulting in teeth infection. The jaw pain is because of the temporomandibular joint disc displacement resulting in radiating pain to the jaws. Nothing to be panic, consult an oral physician and get it evaluated. You have to take radiographs like OPG and TMJ views to confirm the diagnosis. Meanwhile you can take anti-inflammatory analgesics like proximal for the joint disorder. Antibiotics like amoxicillin for the tooth infection. Do not eat hard things, do not open your jaw too wide. I hope my answer will help you, take care.