The hardness of the breasts may be caused by the accumulation of milk, which can be eliminated through massage, hot compresses, and the use of breast pumps, etc. The hardness of the breasts may be caused by the accumulation of milk. 1. Massage, hot compresses: After the breasts began to secrete milk, if the amount of milk is more adequate, but can not be dredged in a timely manner, the phenomenon of breast swelling and hard lumps can occur. Massage and localized hot compresses can be used to unblock the milk ducts and relieve the symptoms of breastfeeding. 2. Use a breast pump: first of all, you need to regularly breastfeed your baby, after feeding your baby, if there is still milk, you should use a breast pump to squeeze out the excess milk, try to avoid the milk remaining in the breast, otherwise it may also cause inflammation. 3. Others: Wear loose and comfortable underwear and keep the area around the breast clean. If the lump does not go away, it is recommended to go to the hospital for examination.