If you have suffered from breast hyperplasia, inflammation or tumor compression during breastfeeding, one of the lobes or lobules of the breast may be blocked, causing milk to accumulate in the ducts and form a breast cyst. It can also be caused by poor breastfeeding habits and milk stagnation in the ducts, resulting in ductal expansion and cyst formation, bacterial invasion and secondary infection, leading to acute mastitis or breast abscess. In the absence of bacterial invasion, cysts can remain in the breast for a long time. During lactation, the lump is not easily detected due to swelling of the breast, and can often be clearly found only after weaning. The cysts are round or oval in shape, with smooth surface and can be pushed, mostly unilateral, single cysts, which can have slight pressure pain and cystic sensation when touched. In the early stage, the cysts contain thin milk, but later, due to the long-term retention of the cysts, the water in the milk is absorbed and the milk is concentrated into a milky white viscous substance, such as condensed milk. Occasionally, it can be curdled milk, or even solid like milk powder. 1. Influence of related diseases If women suffer from breast hyperplasia, inflammation or tumor compression, etc., it may lead to blockage of a glandular lobe or lobular duct of the breast, causing milk to accumulate in the duct and form cysts. So usually other breast diseases are found to be actively treated. If the new mother does not pay attention to the discharge of milk, the milk will accumulate in the breast and become a clinical manifestation of the swelling in the breast, which is often misdiagnosed as a breast tumor. It may also be due to poor breastfeeding habits and stagnation of milk in the ducts, resulting in the ducts dilating to form cysts. 3, stress and other reasons In life, if women are under a lot of pressure every day because of work or life, their emotions are easily unstable, which can trigger endocrine disorders, plant nerve disorders, temper tantrums, etc. These are all factors in the development of breast cysts. When is the best time for breast cyst examination? Generally, breast examination should be chosen around the tenth day of menstruation, when the influence of estrogen on the breast in women’s body is minimal, and the breast is generally in a relatively quiescent state, so that lesions or abnormalities of the breast can be detected more easily. In the case of older women after menopause, they are free to choose the time for breast examinations because their estrogen has decreased. If breast lesions are found during self-examination or screening, they should be seen by a professional hospital as soon as possible. Breast cyst examination items: 1.Multiple fine needle aspiration cytology inspection It has greater value in diagnosing epithelial hyperplasia, combined with X-ray fluoroscopic positioning aspiration biopsy, the correct diagnosis rate is very good, but for cases suspected of cancer, the final confirmation of diagnosis depends on tissue section. B-type ultrasound has a correct diagnosis rate of about 90% for breast lumps. Ultrasound shows no uniform hypoechoic area at the site of hyperplasia, as well as non-echoic cysts. Because of the great difference in the level of detection technology, it should be combined with clinical diagnosis. 3.Infrared thermal imaging is based on the existence of infrared radiation in the body and breast malignant tumor tissues with fast value-added, high metabolism and richer blood than normal, thus generating stronger infrared radiation than normal tissues on all sides, and using infrared thermal imaging technology to turn the temperature difference on the surface of the breast into an image visible to the naked eye. 4.Mammography inspection Cysts are round or oval shaped blocks with similar density to the breast tissue or increased density, with uniform density, smooth edges, and clean demarcation of the tissue on all sides, and occasional eggshell-like patches of calcification on the cyst wall.