While TMJ is thankfully not a life-threatening condition, the pain may gradually increase if it is left untreated for a long time. The reason for contacting a physician as soon as possible should be to feel pain and discomfort in your jaw and face, along with hindering the quality of life due to limited movement. Pain and discomfort left untreated may lead to anxiety and depression. The good news is that TMJ is not a life-threatening condition.