Patients complain of periodontal pain, and the duration and mode of pain is the main diagnostic basis for pulpitis. In the early stages of pulpitis, there is often a short period of spontaneous pain without obvious causes, which can be manifested as dull pain and brief stabbing pain, which often takes longer to relieve during the day and slower to relieve at night; in the middle stages of pulpitis, the pain is slow to relieve at night, which can affect sleep and make it difficult to sit and lie down, and oral pain medication does not have a good effect, and the pain can be mildly relieved in the morning, and the pain is obviously aggravated by hot, cold, sour or sweet stimulation. After timely treatment, the pain cycle is generally 2-3 days; the late stage of pulpitis mostly appears persistent diffuse pain, accompanied by unilateral cheek swelling and discomfort, and in severe cases can induce migraine and facial pain, the patient can not clearly point out which tooth pain, ordinary oral drug treatment is not effective, and mostly take infusion treatment. Since ancient times, toothache is not a disease, but pulpitis cannot be ignored, if not treated in time, it may spread to the surrounding teeth and tissues, and other new diseases may appear, it is recommended to seek medical attention in time to avoid delaying the treatment.