Hot and cold toothache is often seen in deep caries, reproducible pulpitis and non-reproducible pulpitis, and is usually clinically treated by removing the decayed material and then filling or root canal treatment followed by crown restoration. There is no specialized treatment for hot and cold toothache without distinguishing the cause. 1. Deep caries: tooth decay will appear carious cavities, close to the pulp cavity, can be embedded in the hole of the outside world of the hot and cold stimuli to produce a transient pain, stimulation to remove the pain and immediately disappear, the treatment is generally the use of instruments to remove the outside world of the decayed material, the drug cushion resin filling. 2. Reproducible pulpitis: Reproducible pulpitis will produce transient pain to external stimulation of the tooth surface, the pain does not last, often transformed from deep caries, the treatment needs to be used first clove oil medication, treatment to pacify the pulp, to be asymptomatic before the cushion filling. 3. Irreducible pulpitis: Irreducible pulpitis, will produce severe persistent pain to external hot and cold stimuli, can not be restored through external treatment of the pulp state, the treatment is generally root canal treatment, root canal treatment, and consider crown restoration. It is recommended to actively seek medical treatment and follow the doctor’s instructions.