Teeth afraid of cold and heat is generally dentin sensitivity, endodontitis and other diseases, the treatment method for desensitization and root canal treatment combined with anti-inflammatory drugs, as follows. 1. Dentin sensitivity: dentin exposure due to abrasion, wedge-shaped defects, etc., can cause dentin sensitivity, resulting in fear of cold and heat, the treatment method is desensitization, commonly used desensitizing agents are sodium fluoride glycerin, strontium chloride glycerin, ammonia silver fluoride, etc., resulting in parenchymal defects need to be filled and repaired. 2. Pulpitis: Inflammation due to bacterial infection in the pulp tissue, resulting in teeth that are afraid of cold and heat, need to remove the diseased pulp tissue, microorganisms and toxins through root canal treatment, and use root filling materials to tightly fill the root canal. After root canal treatment, the tooth is considered for crown restoration. All of the above medications should be used under the guidance of a doctor, and it is recommended that you visit a hospital to receive professional treatment.