Gums are particularly afraid of cold may be due to improper brushing methods, dental caries, periodontitis and other reasons. 1. Improper brushing methods: for example, often brushing with hard bristles, over time will brush a groove on the teeth, exposing the dentin. This area is also closer to the nerves, which can also cause teeth to be afraid of cold and heat. 2. Dental caries: Caries will occur in the teeth after bacterial infection, and if left untreated, the caries will become more and more serious. When it reaches the level of moderate caries, it is possible to get closer to the nerves. This is when there will be more sensitivity to cold, heat, acid, and sweet. 3. Periodontitis: Periodontitis will lead to gum recession over time, which will easily lead to the exposure of the tooth roots, and will also make the teeth at the roots become sensitive and painful when exposed to cold and heat. When the patient appears to be particularly afraid of cold gums, patients need to go to the hospital in time for treatment.