Tooth drinking cold water pain, there are several possibilities: 1, periodontal disease, when periodontal disease, teeth, gum attachment loss, dentin will be easily exposed, for cold, hot water sensitivity is heavy, then there will be teeth drinking cold water pain phenomenon. Usually, it is recommended to do periodontal treatment, if the tooth is loose, it is necessary to extract the tooth for treatment. 2, the tooth drinking cold water pain may be due to tooth decay, when the tooth appears in the caries, deep caries will have hot and cold sensitivity. It is recommended to fill the tooth in time to avoid the phenomenon of pulpitis. 3.The pain of drinking cold water may be the symptom of pulpitis, or the pulp cavity is exposed or the decay has reached the pulp cavity. In this case, you need to treat the tooth, do the root canal treatment or nerve killing treatment, after killing the nerve, you can perform the dry pulp surgery. 4, the tooth drinking cold water pain may also be due to dentin sensitivity, the tooth has the phenomenon of hidden crack. If the tooth has a vague crack, drinking cold water may be through the crack and deep into the nerve, then there will be pain, generally need to fill or do porcelain crown repair to improve the symptoms.