There are several causes of right jaw pain: first, inflammation of the jaw caused by pulpitis and periodontitis. Second, neuralgia due to the mandibular branch of the trigeminal nerve. Third, inflammation caused by localized submandibular gland inflammation, as well as lymph node and lymphangitis of the jaw. The main reason for the treatment is to distinguish the cause of the disease, sometimes mandibulitis and lymphadenitis are not very clear, for example, because of the existence of periodontitis can cause lymphadenitis, the main reason is to treat the periodontitis, and then the lymphadenitis will be cured. The most difficult clinical problem is that sometimes pulpitis is misdiagnosed as trigeminal neuralgia, or trigeminal neuralgia is misdiagnosed as pulpitis, which should be carefully differentiated. This is not uncommon, especially in persistent trigeminal neuralgia, and when the patient has recurrent attacks without a clear diagnosis of pulpitis, it is important to consider neurology or neurosurgery to further rule it out.