When the milk discharge is blocked or too much milk is secreted, the milk will be stagnant and the milk ducts are not smooth, i.e., the phenomenon of milk blockage occurs, and if the blockage lasts for a longer period of time, a hard lump will be formed. 1. Obstructed milk discharge: when the milk is thick, it is easy to be blocked; secondly, the mammary gland ducts are deformed, and the milk is not discharged smoothly, and it will also be blocked. 2. Excessive secretion of milk: the milk is secreted in large quantities, the baby can’t drink it in time, or the mother can’t empty the milk in time, it is easy to rise, and hard lumps will appear in the long run. When the milk blockage is serious, acute mastitis will occur, so it should be dealt with in time. You can consider using a warm towel, manually massaging your breasts or finding a professional lactation consultant to pass the milk. If you are not feeling well, you should consult a regular hospital in time.