Hot and cold toothache need to choose desensitization treatment, filling, root canal treatment or extraction of the affected tooth according to the original disease, etc. It is recommended to go to the hospital to check the disease and timely treatment. 1. If the toothache is caused by dentin allergy, you can first choose desensitization treatment, using fluoride, laser light desensitization. 2. If the tooth has wedge-shaped defects, caries and other hot and cold stimulation pain, you can choose to fill the defective part, if necessary, can be indirect pulp capping treatment. 3. Teeth with persistent pain from hot and cold can be drilled open and nerve-killing medication can be put in to relieve the pain, and dry pulp therapy or root canal therapy can be done. 4. If the tooth is not functional or cannot be retained, the tooth can be extracted.