Bite muscle pain mouth can not open is due to the occurrence of bite muscle spasm, the role of the bite muscle to close the mouth, the spasm will lead to the upper and lower jaw bite tight and can not open the mouth. At this time should be actively treated, can use local physiotherapy, hot compresses, can also be applied locally closed to release muscle spasm, but also oral non-steroidal painkillers and anti-inflammatory drugs to relieve pain. Relax your mind and don’t be tense during the treatment, tension can also cause the spasm to worsen. So when there is pain in the bite muscle, unable to open the mouth, you should go to the hospital as soon as possible for examination and treatment, active treatment can restore the function of the bite muscle as soon as possible, so that you can open your mouth and eat normally.