Hello, Your night guard is designed to prevent some stress to your jaw and preserve your teeth. Are there other dental treatment recommendations made by your dentist to address your extreme jaw disfunction? Are you in need of orthodontic treatment or a reconstruction of your bite? This will assist your TMJ joint. You can consider seeing other dental specialist including an oral surgeon and orthodontist. X-rays and scans may provide additional details for a diagnosis. I am concerned that you may at risk with some nerve damage in your neck. This may require an evaluation by a neurologist or orthopedic doctor. Do you have a history of any back or neck trauma? This can include a fal, car accident or sport activity. A chiropractor may offer you relief and take xrays for diagnostic information. Anti-inflammatory medication may assist relief for muscle tension. I suggest you discuss additional steps with your dentsit and the massage therapist. Thank you for your inquiry. I hope you feel better soon. I am available to answer additional questions if you can provide your medical history and further description of your condition.