Mammary gland hyperplasia is a physiological phenomenon experienced by every woman of childbearing age. It is caused by the cyclical proliferation and rejuvenation of breast cells, and when this cyclical proliferation exceeds a certain limit and does not recover normally, pathological hyperplasia occurs, i.e. mammary gland hyperplasia. Mammary gland hyperplasia will accompany most women throughout their life without becoming cancerous, but some high-risk groups will gradually become breast cancer after a long process of ten or even twenty years, but this percentage is very low. Therefore, there is nothing to worry about when you have mastocytosis, but you should do regular specialist checkups.