Pulpitis is caused by the further development of caries, which allows bacterial infection to reach the pulp tissue, causing an inflammatory reaction. Caries is just a bacterial infection of the hard tissues of the teeth. If it is stopped in time, that is, by drilling to remove the infected part and filling the tooth, it is very difficult for pulpitis to occur. If the bacteria are not removed in time with a drill, further infection can cause inflammation of the tooth nerve, resulting in symptoms of pulpitis, including obvious pain from cold, heat, acidity, and sweetness stimuli, nighttime pain, and worsening with temperature stimuli. Pulpitis requires dental treatment, including nerve devitalization, medication after nerve death, and ultimately root canal filling. This means that a complete root canal treatment is needed to cure it.