Under normal circumstances, the mammary glands are affected by the hormone levels in the body and undergo regular hyperplasia, with each menstrual cycle showing changes in hyperplasia and rejuvenation to prepare women for breastfeeding after conception, and the mammary glands begin to rejuvenate when there is no conception in the menstrual cycle. The common term mammary gland hyperplasia is due to the disruption of hormone levels in the body, which results in excessive hyperplasia and incomplete rejuvenation of the breast parenchyma, and does not affect the quality of breast milk, nor does normal breastfeeding aggravate the symptoms of mammary gland hyperplasia. The symptoms of mastocytosis will improve due to breastfeeding, so you need to pay attention to avoid hormone-containing drugs and foods, etc. If you find abnormalities in the breast, you need to go to the hospital for an ultrasound to rule out other diseases.