Possible causes of occlusal pain include inflammatory diseases, trigeminal neuralgia, temporomandibular joint misalignment, and oral diseases. 1. Inflammatory diseases: when there are inflammatory diseases such as temporomandibular arthritis, mumps, etc., due to the inflammatory lesions stimulate the peripheral nerves around the occlusal muscles, the symptoms of occlusal muscle pain can appear. 2. Trigeminal neuralgia: usually induced by immune factors, mental factors, nerve injury, etc., the occlusal muscle in the maxillofacial area will experience severe pain such as tearing, pins and needles, cutting, burning or electric shock. 3. Temporomandibular joint misalignment: usually caused by trauma, inflammatory diseases, muscle strain, etc. Common symptoms include inability to close the mouth, unclear speech, severe pain in the occlusal muscles, inability to swallow and chew. 4. Oral diseases: If there are oral diseases such as apical periodontitis, eruption of the third molar, pericoronitis, etc., due to the painful involvement of the focal site in the oral cavity, it may lead to the symptoms of occlusal muscle pain. The presence of occlusal muscle pain, it is recommended to go to a regular hospital to identify the cause and actively treat it.