Drinking cold or hot water will have a toothache mainly due to enamel damage, periodontitis, endodontitis, etc., mainly through anti-allergy, periodontal treatment, root canal treatment and other ways of treatment. 1. Enamel damage: the surface of human teeth has a layer of enamel covering the surface, can play a role in protecting the teeth from external stimuli, enamel is damaged after food directly stimulate the teeth themselves, and there will be hot and cold stimulation will be painful phenomenon, you need to use anti-allergic toothpaste to brush your teeth, the damage is serious, you need to do veneers or porcelain teeth to protect the teeth. 2. Periodontitis: when the teeth around the presence of dental calculus, plaque and other long-term stimulation, resulting in the destruction of periodontal support tissues (gums, alveolar bone, etc.), the formation of periodontal pockets, and then receding gums, root exposure, hot and cold food stimulation leads to pain, periodontal treatment, maintain oral hygiene, regular review. 3. Pulpitis: Patients with pulpitis often experience spontaneous tooth pain, hot and cold pain due to inflammation in the pulp area, and it is recommended that patients seek timely treatment for root canal therapy. There may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.