Hard breast lumps during breastfeeding can be treated with cephalosporin, lactobacillus, and prolotherapy drugs. There are many clinical reasons for breast lumps during breastfeeding, but most of them are caused by inflammation in the breast area. When the nipple is broken during breastfeeding, bacteria can enter the breast along the milk ducts and form mastitis, thus causing lumps. Cephalosporin belongs to the antibiotic class of drugs, and after taking it, it will stop the bacterial cell wall synthesis and has a bactericidal effect. It is also widely used and can be applied to mastitis caused by bacteria. It should be used under the guidance of a doctor to avoid harming your baby. For canker sores that cause pain in the breast area at the beginning, take the Chinese herbal medicine Lactobacillus. The ingredients of the drug include dandelion, deer horn and panax ginseng, which can soften and disperse the knots, clear heat and detoxify the toxins, as well as antibacterial and anti-inflammatory, relieve the swelling and pain in the breast area, and eliminate the lumps. It should also be taken in conjunction with Prosperity Pill, which can relieve chest and rib swelling and pain, loss of appetite, and breast enlargement caused by liver qi stagnation.