After the teeth are discolored, no matter how you brush them, it will affect the appearance. Therefore, many people want to know the reason for the discoloration of the teeth and worry that the discoloration of the teeth will be caused by the necrosis of the teeth. Is this really the case? How to fix this situation? Tooth discoloration is a very common condition. There are many reasons for tooth discoloration, which are not necessarily tooth necrosis. To know the specific cause, it needs to be determined after a professional examination. Here are some common causes of tooth discoloration: one is tooth discoloration caused by common exogenous coloring factors, such as coffee teeth, cigarette stained teeth, and tea stained teeth, which are caused by drinking a certain beverage for a long time. Dyed and discolored. For this kind of tooth discoloration, a general cleaning can be used to solve it. Is tooth discoloration necrotic? How to fix it? Another type of tooth discoloration before and after treatment is age-related tooth discoloration, that is, teeth gradually turn yellow with age. This is very common and normal. If you want to solve this problem, you can use professional cold light whitening treatment to solve it. In addition to the above two cases, there is also a tooth discoloration caused by endogenous coloring factors, such as tetracycline teeth, fluorosis teeth, etc., among which tetracycline teeth are due to the use of tetracycline drugs during tooth development. Tooth discoloration occurs in the bones and teeth, while dental fluorosis is caused by excessive intake of fluoride during tooth development. Is tooth discoloration necrotic? How to fix it? These two cases are more complicated and cannot be solved by general methods, and must be treated symptomatically according to specific dental conditions. Generally speaking, the commonly used methods to solve tetracycline teeth and fluorosis teeth include cold light whitening, dental veneer, porcelain teeth, etc., but which method to use can only be determined after inspection by a professional doctor. The above are the common causes of tooth discoloration. Not all tooth discoloration is caused by tooth necrosis, but it will definitely cause discoloration after tooth necrosis. Fragile and easy to break, so see a doctor promptly.