Milk lumps, also known medically as milk stagnation. In addition to lumps, accompanied by tenderness and fever, it is called acute mastitis. The most fundamental treatment for breast milk stagnation and mastitis is to unclog the mammary glands and expel the stagnant milk. You can massage the lumps by hand to empty the breasts, or you can hire a lactation consultant or go to a breast specialist for unblocking treatment. At the same time, avoid eating foods or medicines that promote lactation, and use traditional Chinese medicines to unblock the breast channels, such as Tongcao, Guangdong Wang Bu Liuxing, Lulutong, and so on. After the lumps are removed, both breasts should be emptied after each feeding to avoid re-stagnation.