A burst of toothache may be caused by acute pulpitis, which is mainly characterized by spontaneous paroxysmal pain. Acute pulpitis is a class of more serious inflammation of the pulp, the lesion can involve the pulp of the local or all, and even in the center of the inflammation in varying degrees of pus or necrosis, resulting in increased pressure in the pulp cavity. Acute pulpitis is characterized by severe pain, spontaneous paroxysmal pain, pain aggravated by cold and heat, and unclear pain localization. Prolonged irritation can lead to chronic pulpitis. There may be other reasons for the pain in the teeth, it is recommended to go to the dental hospital for examination and treatment. Acute pulpitis is generally ineffective in drug treatment and requires timely root canal treatment to remove the inflammatory substances in the root canal.