Tooth sensitivity to hot and cold can be caused by several factors, including enamel erosion, cavities, gum recession, or exposed tooth roots. Other reasons include worn fillings, cracked teeth, or recent dental treatments. When enamel wears down, it exposes the dentin, making teeth more sensitive to temperature changes. Using a desensitizing toothpaste, maintaining good oral hygiene,... https://toothandgumclinic.com/blogs/reasons-for-hot-and-cold-sensations-in-your-teeth/