Cold water pain is usually caused by tooth decay or excessive tooth wear, or wedge-shaped tooth loss, which is especially prone to the phenomenon of cold water pain. If the tooth is decayed, it should be repaired in time, if the wear is heavy, it can also be filled or choose to do porcelain braces repair, which can avoid the phenomenon of cold water pain. If the pain is not heavy, you can do the tooth desensitization treatment, generally you can choose to apply desensitizer or use laser for desensitization. In addition, if the tooth has a wedge-shaped defect, usually choose to do a resin filling or glass ionomer filling. It is also necessary to correct the way of brushing teeth, not to brush horizontally, but to use the Bachmann method or vertical rotation method to avoid damage to the gums and to avoid wedge-shaped defects. Also avoid drinking particularly cold water, which can relieve the symptoms. In case of persistent pain with cold water, nerve killing treatment of the tooth is usually required.