First of all, if there is pulpitis, there will be a very obvious pain response, with spontaneous sharpness, paroxysmal pain, as well as pain induced by or aggravated by cold and hot stimuli, nocturnal pain, and radiation pain in the head. The pain caused by this pulpitis needs nerve killing treatment. Neurocidal treatment is the fastest, most effective and most scientific treatment for pulpitis. During the treatment, Fufenbid can be taken orally to better relieve pain. Of course, for endodontic treatment of pulpitis, CP can be sealed for dressing change of root canal, FC or calcium hydroxide can also be sealed. This drug can be used for dressing change and disinfection of root canal until there is no symptom, no exudation, no clinical discomfort, and then root canal filling can be carried out to complete root canal treatment.