Baby weaning 18 months still squeeze out yellow oil, may be the milk is not timely discharged, but also may have breast ducts within the papilloma, breast fibroids, breast cancer and other diseases lead to. After 18 months of weaning, there will be if the body secretion of milk is not timely discharged, it will be accumulated in the breast, over time, these milk will become yellowish liquid, be extruded out of the body. If you suffer from breast inflammation, breast ductal papilloma, breast fibroid, breast cancer and other breast diseases, you will also have nipple secretion yellowish, brown or coffee-colored overflow. It is usually caused by abnormal hormone secretion in the body due to the disease. It is recommended to go to the hospital for prolactin examination or breast ultrasound, molybdenum target examination, etc., to clarify the cause and then actively deal with it.