Whether or not a breast cyst will disappear on its own is determined on a case-by-case basis. A few mild cases of breast cysts may disappear on their own, but severe breast cysts will not disappear on their own, and can be treated by unblocking the milk ducts and surgical excision. Accumulated breast cysts are caused by the accumulation of milk in the milk ducts and milk stagnation. Appropriate massage can promote the discharge of stagnant milk and nipple, and relieve the swelling and pain of the breast caused by milk stagnation. This kind of cysts caused by milk stagnation during breastfeeding may be absorbed and disappear gradually in mild cases. If the breast stagnation cyst is more serious, it will not disappear on its own, and can be treated by unblocking the milk ducts to discharge the stagnant milk, or by surgical excision. It is recommended to consult a hospital for standardized examination and treatment.