Eating hot and cold things toothache may be due to dentin sensitivity, dental caries and gingivitis and other factors, can be symptomatic use of desensitization treatment, caries repair, scaling and other methods of treatment. 1. Dentin sensitivity: Dentin sensitivity is generally due to excessive wear and tear of the teeth or dentin allergy, dentin exposure, when consuming cold or hot food is stimulated, toothache occurs. You can go to the regular hospital for desensitization treatment, and you can use desensitizing toothpaste to brush your teeth; 2. Dental caries: If there are cavities on the teeth, it may cause toothache when the nerve is stimulated by too cold or too hot food, and patients need to go to regular hospitals to have the caries repaired by professional doctors or use root canal treatment to relieve the pain; 3. Gingivitis: gingivitis refers to inflammation of the gum tissue, mainly caused by plaque, usually in the consumption of hard objects will appear bleeding gums, eat hot and cold things will also produce stimulation of the teeth, a toothache can be cleared through the scaling plaque, tartar, if the symptoms are more serious, can be used under the guidance of the doctor 1% ~ 3% hydrogen peroxide solution rinse. Teeth discomfort reaction, should be timely to the hospital on the teeth examination, clear cause, take targeted approach to solve the problem.