Hello, I am suspect of nerve involvement from your progression of symptoms. Certainly pressure can affect a nerve. Inflammation can cause swelling, place pressure on nerves and muscles. You could consider migraine headaches, fibromyalgia, bell s palsy, other infections as a possible diagnosis that could contribute to TMJ discomfort and affect function with various other symptoms. Stress levels can affect TMJ and cause you to clench your teeth. Reduce any stress when possible. Dental symptoms can include excessive wear on the chewing surface of your teeth, weakened enamel at the gum line with excessive wear into the tooth, craze lines visible in the enamel, teeth sensitivity not due to decay and fracturing of teeth or restorations. Are you aware of any of these conditions from your dental visits? Do you think you grind your teeth? Your bite can contribute to TMJ conditions and must be considered. I place my patients in night (occlusal) guards to protect and prevent grinding away of enamel when I observe these conditions. You could consider trying a mouth guard to see if your symptoms lessen. Over the counter night mouth guards are available at the drug store in the dental section. The oral surgeon will look for damage to the joint of the TMJ. A panorex x-ray can show changes to the bone. CT scans or an MRI can provide more information and show soft tissue changes including tumors. I have not had patients report sweating and a pulsating lip as a symptom of TMJ. There are always exceptions. If your pain is severe enough, this could explain your particular reaction to the sress of TMJ. Try to reduce muscle tension by keeping well hydrated and reduce your intake of caffienated drinks. Anti-inflammatory drugs may help. Moist heat may also help muscles to relax. I do think an oral surgeon is a good recommendation to help your diagnosis. The AMA and ADA do not recognize a TMJ specialty. I hope you find my suggestions helpful. I have provided some treatments you can try at home. Relief of some symptoms should be recorded and reported to the oral surgeon. Thank you for your inquiry. I would be glad to assist you further or answer additional questions.