Acute pulpitis can recur several times during the 1 week to 1 month of its onset, with each painful episode lasting about 3 days, ranging from about 1 hour to several hours each time, and the pain is often unbearable. Acute pulpitis is mainly due to acute inflammation of the dental pulp due to bacterial infection. The bacteria produce toxins that cause a sharp increase in pressure in the closed pulp cavity, which at the same time compresses the pulp and produces severe pain. The pain of acute pulpitis has certain characteristics, generally manifesting as nocturnal pain, spontaneous radiating pain, hot and cold stimulation pain, and the patient cannot locate it, and cavities are often visible on the crown surface during examination. Patients can be decompressed by opening the pulp during emergency consultation, the pain can be relieved immediately, painkillers are placed in the pulp cavity, antibiotics are taken at the same time, and root canal treatment is performed at a later stage. It is recommended to pay attention to keep oral hygiene, brush teeth regularly, and have oral examination regularly, once the hidden tooth is found, it is better to go to the dental hospital in time.