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 a number of tubules, which lie between the enamel and the pulp and contain nerve fibers and fluid. When an external stimulus is applied, the flow of fluid in the dentin tubules is accelerated, which stimulates the nerve endings and produces pain. Often gum 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, four major factors in the “blame” 1, gum recession tooth root surface has countless tubules through the pulp nerve, once the gums shrink, the teeth lost 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) too much brushing force, brush bristles are too hard, causing the gums to recede, the root surface of the teeth exposed; (2) periodontitis caused by recession of the gums, exposing 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 crown surface enamel wear, resulting in fragile dentin exposure. The structure of dentin is similar to that of tooth roots, and there are countless small tubes that lead to the pulp nerves, and temperature or mechanical stimulation will provoke the nerves. Tightly clenching or grinding teeth, brushing teeth with too much force across the brush, too long a distance, frequent use of acid-containing mouthwash, excessive consumption of acidic substances, all of which can lead to enamel erosion. Suggestions: (1) wear bite pads to reduce enamel wear caused by grinding or clenching teeth; (2) master the correct brushing method, try to brush vertically; (3) consult your dentist to replace neutral fluoride mouthwash; (4) rinse your mouth with water after consuming acidic substances. 3, dental caries caries is the progressive destruction of the tooth enamel, dentin, the destruction of the depth of the closer to the pulp nerves, the more pronounced the sensitivity symptoms. Eating cold, hot, sour, sweet food touches the carious place, it is very easy to trigger sensitive pain. Suggestions: Maintain good oral hygiene, eat a reasonable diet, and have regular dental checkups. Once you find caries, you should consult a doctor immediately.4. Cryptocleidosis can be caused by chewing hard food, etc. Although the tooth is intact, when it is chewed, the tooth will be damaged. Although the tooth is intact, but when chewing, friction prompted by the crack on both sides of the tissue to produce relative movement, mechanical and friction 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!