Thin mammary ducts do not necessarily lead to low milk supply. Thin mammary ducts may make it difficult for the baby to take milk, and if the mammary ducts are thin and there is a blockage, you can wash your nipples with warm boiled water. The reason for low milk supply may be that the milk cannot be discharged smoothly due to the blockage of the milk ducts in the breasts. You can apply hot compresses to the breasts and massage the breasts appropriately to promote local blood circulation and increase milk production by unclogging the milk ducts. If the baby does not finish the milk when taking the milk, you can use a breast pump to suck out the excess milk from the breast. At the same time, to maintain a good mood, breastfeeding mothers can eat foods containing more soup and high protein, which can promote milk secretion, such as bone broth, fish soup or broth, which can increase nutrition and produce more milk. Ensure sufficient sleep and rest time in daily life, overwork, insufficient rest and lack of sleep will also lead to reduced milk production.