Tooth sensitivity after tooth extraction is considered to be improper operation, neighboring teeth adjacent to the presence of caries, alveolar bone resorption leading to root exposure and other conditions, the specific causes are recommended to the dental hospital in a timely manner for examination and analysis. 1. Improper operation ah: after tooth extraction if the teeth in the short term symptoms of acidity and sensitivity, considering the possibility of extraction process instruments accidentally damage neighboring teeth caused by sensitivity and other uncomfortable symptoms, it is recommended that the combination of clinical examination to confirm the diagnosis. 2. Neighboring teeth have adjacent caries: If the adjacent teeth have sensitive symptoms after tooth extraction, it is considered that there may be hidden caries or deep caries on the adjacent surface of the neighboring teeth, and the adjacent surface is fully exposed after tooth extraction, so the symptoms of sensitivity may occur when subjected to hot and cold stimuli, and it is necessary to clean up the adjacent caries in time and then fill the teeth. 3. Alveolar bone resorption leading to root exposure: generally after tooth extraction, the alveolar bone in the extraction socket needs to undergo a period of resorption to rebuild, the alveolar bone resorption may lead to the exposure of the adjacent root surface, thus forming the symptom of tooth sensitivity, it is recommended to use anti-allergic toothpaste and desensitization treatment. After tooth extraction tooth sensitivity, it is best to find a dentist in time for examination and targeted treatment.