Patients with acute pulpitis often complain of increased pain in their teeth in the middle of the night and cannot sleep because of the pain, which means they have acute pulpitis. Acute pulpitis is mostly caused by dental caries and is an acute attack of pulp congestion or chronic pulpitis, which is often clinically manifested as severe pain of the tooth, which may be aggravated by hot and cold stimulation, and aggravated at night. When the inflammation of pulpitis is heavy, it can be manifested as hot pain and cold relief. Generally, patients with acute pulpitis can take oral anti-inflammatory drugs and painkillers to relieve the pain symptoms (there are individual differences), and when the inflammation develops to a period of hot pain and cold relief, oral anti-inflammatory drugs or painkillers often cannot relieve the pain, and root canal treatment is started by a professional endodontist, and the pain symptoms of the tooth will be relieved after 1-2 days of pulp drainage under local anesthesia .