Most breast enlargement is physiological, usually not serious, and can be relieved after symptomatic treatment, only a very small number of atypical breast enlargement may develop into breast cancer. Mammary gland hyperplasia is usually caused by estrogen metabolism disorder, which manifests as breast swelling and pain and lumps, and the swelling and pain are usually related to menstrual cycle. Nowadays, young women are gradually becoming a high prevalence of mastocytosis, which is mainly related to stress, irregular life and unreasonable diet. Mammary gland hyperplasia itself is not a serious disease, and the possibility of cancer is relatively low, but when you are found to have mammary gland hyperplasia, you should still pay attention to breast health care and observe whether there is an increase in symptoms. If a patient with mastocytosis has obvious clinical symptoms, such as a significantly larger lump, he or she should go to a regular hospital for an examination in a timely manner.