Breast is an important feature of women, but there are also many breast diseases. Mammary gland hyperplasia is one of the common ones, and many patients are asking whether mammary gland hyperplasia can become cancerous? Can mastocytosis be cancerous in real terms? Who can come out to explain whether mastocytosis can become cancerous? In this regard, we are here to give you some knowledge about this topic. It is true that many women associate tumors with hyperplasia and lumps when they hear about them, so they are afraid of mammary gland hyperplasia and worry about cancer. In fact, breast enlargement is a common disease among middle-aged women around 40 years old, which is a disorder of the normal structure of the breast, not cancer, and most of them will not turn into cancer. It is because of the lack of understanding of it that many people are overly nervous. Endocrine disorder causes breast hyperplasia, which is also called mammary adenopathy, and it is a benign hyperplasia of breast tissue. Therefore, it is neither a tumor nor an inflammatory disease. About half of women over the age of 30 have varying degrees of breast enlargement. The cause of mammary gland hyperplasia is a disorder of ovarian endocrine function, i.e., it is caused by elevated estrogen and decreased luteinizing hormone. Under normal circumstances, women also have cyclical enlargement of breast tissue, but with the cyclical adjustment of hormones, the breast tissue will recover. However, some women have endocrine disorders and incomplete breast restoration, so that the breast feels lumpy and is accompanied by premenstrual sensation. We emphasize that mammary gland hyperplasia occurs mostly in the age of about 40 years old, and it is to distinguish it from physiological hyperplasia in adolescents and during pregnancy and lactation. In adolescent girls, the mammary glands begin to develop, and even if they feel slightly swollen and painful, this is normal; during breastfeeding and pregnancy, the mammary glands have to be prepared for feeding the baby, and hyperplasia is also normal. After menopause, because the overall endocrine level decreases, especially estrogen begins to decrease, the majority of breast enlargement is safe from the histological point of view, breast enlargement is divided into many kinds, the possibility of cancer varies. The most common type of hyperplasia is simple lobular hyperplasia, which accounts for more than half of all mammary gland hyperplasia, and this type of hyperplasia is not cancerous; ductal epithelial hyperplasia without cellular anomalies accounts for one-fifth, of which only one percent is cancerous; ductal epithelial hyperplasia with cellular anomalies accounts for one-tenth of patients, of which three percent of patients with mild cellular anomalies are cancerous and three percent of patients with severe anomalies are cancerous. The vast majority of breast hyperplasia is safe and will not become cancerous, so patients only need regular self-examination and hospital review. According to statistics, the incidence rate of breast cancer in China is about 30 per 100,000, and there is a rising trend in recent years. Women with mammary hyperplasia, especially those with family history of cancer, early menarche, late menopause, late childbearing, infertility and non-lactation, should still pay attention to hyperplasia and tumor differentiation. Mammary gland hyperplasia usually develops bilaterally at the same time and is felt as a swelling and pain associated with the menstrual cycle. The borders of the lumps are not clear to the touch, or they have bead-like changes, and the texture is not very hard, with no adhesion to the skin. Breast cancer often starts as a painless lump, even though some patients are painful, mostly with mastopexy. The lump has a distinct border with adhesions to the skin, and sometimes there is nipple subsidence, which manifests as orange peel-like skin changes or even ulcers. When the lump is pushed with the finger, it can move freely under the skin at first, and further development, the lump can adhere to the chest wall and cannot be moved. After the symptoms are detected, it is important for the patient to go to the hospital at this time for an accurate diagnosis and timely treatment. The current aid Breast self-examination is the best way to detect breast diseases. We hope that all women can observe their health more often.