Three years after quitting breastfeeding, there is still residual milk which is not normal. Under normal circumstances, there is no milk after six months of weaning, and the residual milk will be gradually absorbed, so after three years, you will not be able to squeeze out the milk, which may not be milk but an abnormal secretion from the breasts. If you see discharge from the nipple, it may be caused by breast enlargement, breast cysts and other diseases. 1. Mammary hyperplasia: Mammary hyperplasia is a benign breast disease caused by malfunctioning of the normal development and degeneration process of the mammary glands, which usually leads to symptoms such as breast pain, nodules or lumps, and partially combined with nipple discharge. For patients with breast hyperplasia, please go to the hospital in time and use medication such as triamcinolone acetonide treatment under the doctor’s guidance. 2. Breast cysts: Breast cysts are round or oval fluid-filled cystic masses in the breast, which may cause pain, nipple discharge and other symptoms. Breast cysts are mostly benign lesions, generally no need to worry about, but because some malignant breast disease is also often manifested as breast lumps, so once found breast lumps, should be as soon as possible to the hospital. Three years after quitting breastfeeding, there is still residual milk which may be caused by mastitis, breast tumor and other reasons, which is abnormal, if you have this kind of situation, please go to the hospital immediately.