A tingle when brushing your teeth with cold water early in the morning? Sudden tooth tenderness when eating cold and sour food? Tingling when you take a deep breath on a cold morning? If so, your teeth may belong to “sensitive teeth” (the scientific name is dentin sensitivity). Dentin consists of many small tubules that lie between the enamel and the pulp and contain nerve fibers and fluid. When externally stimulated, the flow of fluid within the dentin tubules widens, which stimulates the nerve endings and produces pain. Often periodontal recession, tooth wear, external stimuli are more likely to reach the pulp nerve through the open dentin tubules and trigger tooth sensation tingling, so tooth sensitivity is a clinical manifestation of a variety of oral diseases, is not a disease. Tooth sensitivity, the four major factors in the “blame” 1, gum recession tooth root surface there are countless tubules through the pulp nerve, once the gums shrink, the teeth lose the gum barrier, the stimulus can be unimpeded direct stimulation of the pulp nerve, easy to cause sensitivity and pain and other symptoms. This may be due to: (1) brushing too hard, too hard bristles, caused by gum recession, root surface exposure; (2) periodontitis caused by gum recession, exposure of the root surface. Suggestions: (1) choose a soft-bristled toothbrush, control the brushing force; if you can not control the brushing force, it is recommended to use an electric toothbrush; (2) visit the dentist regularly for dental cleaning and periodontal treatment. 2. Crown enamel wear The enamel on the surface of the crown is worn down, resulting in the exposure of the fragile dentin. The structure of dentin is similar to the root of a tooth, and there are countless small tubes that lead to the pulp nerves, and temperature or mechanical stimulation can agitate the nerves. Enamel erosion can be caused by clenching or grinding teeth, brushing with too much force across the teeth for too long a distance, frequent use of mouthwash containing acids, and excessive consumption of acidic substances. Suggestions: (1) Wear bite pads to reduce enamel wear caused by teeth grinding or clenching; (2) Know the correct way of brushing and brush vertically as much as possible; (3) Consult your dentist to replace neutral fluoride-containing mouthwash; (4) Rinse your mouth with water after consuming acidic substances. 3, dental caries Caries is the process of gradual destruction of tooth enamel and dentin, and the closer the depth of destruction is to the pulp nerve, the more obvious the sensitivity symptoms. Eating cold, hot, sour, sweet food touches the caries, very easy to trigger sensitive pain. Suggestions: Maintain good oral hygiene, reasonable diet, and regular dental checkups. Once found caries, should immediately consult the doctor. 4, cryptocleidosis Chewing hard food can lead to cryptocleidosis. Although the tooth is intact, when chewing, the friction force prompts the tissues on both sides of the crack to produce relative movement, mechanical and friction generated by the heat may provoke the pulp nerve, causing pain. In addition, hidden cracks may retain bacteria, leading to pulpal infections and causing severe pain. Once you find a cracked tooth, you should consult a doctor in time to prevent “secondary damage” to the tooth. In the early stages of a cracked tooth, fillings, root canals, crowns, etc. can be used to save the tooth. If the tooth is completely cracked, then it can only be solved by extracting the tooth. Warm reminder: tooth sensitivity looks like a small thing, but the situation will be more serious if you keep on holding on to it. As the saying goes, a good tooth is good for the appetite, so don’t “put up with it” anymore, early detection and early treatment!