Causes of occurrence Cause 1, hormonal changes Changes in body sex hormones: If there is already a large amount of plaque and tartar buildup in the mother-to-be’s mouth, her body sex hormones will change after pregnancy, which will lead to what is medically known as gingivitis during pregnancy, and even lead to verrucous proliferation of the gums and the formation of gingival tumors. The change in sex hormones in the mother-to-be’s body, especially the increase in progesterone, prompts expansion, distortion and circulatory stagnation of the tiny blood vessel clusters in the gums, which can cause the gums to often appear red and swollen and more sensitive to mechanical stimulation, locally manifesting as bleeding gums. Gingivitis during pregnancy often begins to worsen in the second to third trimester, and becomes more serious in the eighth month of pregnancy, often even accompanied by toothache, bleeding teeth, bad breath, etc. Reason 2: Change in eating habits and increase in frequency of eating sweets: The mother-to-be will not control her diet after pregnancy, so eating sweets without fear will lead to an increase in the chance of getting dental disease. Eating sweets will change the pH value of saliva of the mother-to-be, and the acid-base balance in the mouth will be broken, while the oral hygiene has not been strengthened, because brushing teeth will make her vomit, so it is difficult to insist on brushing teeth after each meal. Therefore, the mother-to-be who did not have caries or inflammation before pregnancy will also suffer from caries and other gum inflammation at this time. The number of times of eating in a day increases: the endocrine change of the mother-to-be after pregnancy, the fetal growth and development of the demand for nutrients increases, the mother-to-be is often hungry, often food does not leave the mouth, and can not guarantee to brush teeth immediately after eating, which provides a good nutrition and breeding ground for bacteria to breed on the tooth surface. This provides good nutrition and breeding place for bacteria to breed on the tooth surface, and the acid produced by bacteria metabolism makes the tooth surface corroded and deglossed, which is easy to form tooth decay and increase the chance of dental disease. Reason 3, pregnancy reaction, pregnancy vomiting When pregnant, pregnant mothers will have pregnancy vomiting phenomenon, vomiting acid reflux, vomiting out the acidic material is easy to cause teeth decalcification, if not timely rinse mouth, stomach acid will corrode the tooth surface and can lead to tooth decay. Reason 4, did not really do a good job of oral cleaning in the case of congenital and acquired environment, if pregnant mothers do not increase the number of brushing, or originally did not have a good cleaning habits, then it is easy to produce dental disease, or make the original problem worsen. Tooth decay, gingivitis, and periodontal disease are all common dental problems during pregnancy, and some pregnant moms will overreact to plaque, making their gums swell up and forming pregnancy gingivomas. People usually do not pay attention to dental care, but only realize the importance of dental health when their gums bleed or their wisdom teeth become painful during pregnancy. Many pregnant moms let their good teeth turn into bad teeth because they are worried that dental visits, medication, etc. will affect the development of their babies. Some mothers-to-be do not have their wisdom teeth fully grown, which may cause inflammation of the surrounding gums and increase the chances of dental disease. When the mother-to-be has inflamed gums, when the upper teeth bite into the inflamed flesh, the more they bite, the more swollen the flesh becomes, causing swelling and, in severe cases, the formation of pus. The gums produce intense pain, which is often unbearable for the mother-to-be who is experiencing rapid physical and psychological changes.