There are many reasons for milk secretion a year after weaning, as follows: 1. The breasts and nipples are often stimulated after weaning, such as when the baby touches them or during sex, which is a normal physiological phenomenon. 2. Unstable hormone levels, such as high lactogen in the body, can be treated with appropriate endocrine regulation, medication, less greasy food, more vegetables, more rest, and proper exercise. 3. 3. Breast diseases, such as mastitis and breast cancer, which can cause overflow from the nipples and are yellow in severe cases, and require fluid infusion to reduce inflammation. If it is breast cancer, it will be accompanied by tingling and swelling of the breast and uneven skin, which requires timely selection of appropriate treatment plan and regular review.