It is normal to squeeze out yellowish discharge after six months of weaning, if there are no other uncomfortable symptoms, there is no need for treatment. The mammary glands have a secretion function, there will be a small amount of secretion, discharged through the mammary ducts, squeeze the nipple there will be yellow or milky white liquid, especially in the days before menstruation, as long as there are no other uncomfortable symptoms, is normal. Some patients with cystic hyperplasia of the breast may also have yellow or yellow-green nipple discharge, which is related to breast tissue hyperplasia, dilated milk ducts and increased secretion. Breast ducts are connected to the outside world through the nipple, if there is a bacterial invasion that leads to infection in the ducts of the breast, there will be yellow discharge accompanied by redness, swelling and pain in the breast, considering mastitis, you need to go to the hospital for formal treatment, try to go to the hospital for examination, and then according to the specific circumstances of the treatment.