Caries pain is not necessarily a leaking nerve, but can also be reversible pulpitis or irritation pain. 1. Deep caries. Caries pain may be deep caries, manifested as a transient pain to embedded food in the cavity of the tooth, remove the food debris pain disappears, generally remove the decay after resin filling can be. 2. Reproducible pulpitis. Reproducible pulpitis is common in deep caries, the lesion has been close to the pulp but there is still a certain distance from the pulp cavity, but the external hot and cold stimuli will produce a transient pain on the tooth, but the stimulus to remove the pain and immediately disappeared, at this time, the pulp has been in a congested state, need to remove the decay of the stimulus, and so on, and soothe the treatment, such as the use of oil of clove, etc., after the symptoms are relieved, can be considered to carry on the filling treatment or other. Caries pain whether the leakage of nerve specific to the hospital for oral clinical and X-ray examination to confirm the diagnosis.