What harm does rotten tooth not pull out have

Rotten teeth do not pull out the harm there are many, first of all rotten roots stay there, it may cause repeated inflammation, causing cheek swelling; there are rotten teeth do not pull out, the roots will stimulate the mucosa caused by ulcers, some middle-aged and elderly people will even cause cancer; there are children's deciduous teeth, if there is no treatment to cause chronic inflammation, then it may affect the development of the following permanent tooth germ.