Some women who have just entered breastfeeding have a high risk of developing a breast cyst if they do not take good care of their breasts and ducts. Cysts are a benign condition that does not cause any serious health problems. If the diagnosis is not clear, it can be confused with malignant tumors of the breast, which requires patients to pay attention to their symptoms. The symptoms of cumulative breast cyst 1. General symptoms: The onset is often during lactation or pregnancy, especially after weaning from breastfeeding. There may be a history of acute and chronic inflammation, trauma or surgery, and the site of onset is mostly at the site of previous breast inflammation, trauma and surgery. 2. Special symptoms: (1) Pain: Most patients have mild swelling and pain, such as secondary infection with local skin redness and pressure pain. The ipsilateral axillary lymph nodes are often enlarged and have tenderness. (2) Lumps: The breast lumps are round, smooth and movable, cystic, with clear borders and no tenderness, mostly 2 to 5 cm in diameter. Large lumps are cystic to the touch and seem elastic. The cystic sensation is not obvious in masses smaller than 2 cm. When the contents of the sac become thick, the elasticity disappears and the hardness increases and becomes more solid, which is easily misdiagnosed as breast cancer. If some diseases are misdiagnosed, it will make a wrong judgment on the treatment method. As long as we pay attention to our symptoms, we can avoid this problem in one aspect. It is also necessary to make a detailed examination of our body to avoid misdiagnosis so that early treatment can be carried out.