There is still a hard lump and pain in the breast after breastfeeding.
After breastfeeding, if the breasts still feel painful and swollen, this may be related to mastitis.
If there was no breast lump before lactation but a new lump appears during breastfeeding, it is likely due to milk stasis. In mild cases of milk stasis, the lump may shrink or disappear after feeding. However, if the lump persists despite breastfeeding or breast massage, it may be diagnosed as a galactocele (milk cyst). If a breast lump existed before lactation or was previously present but undetected, it could be a fibroadenoma. The presence of a hardened area due to retained milk suggests poor ductal patency. Therefore, it's important to develop good breastfeeding habits—breastfeed every 2 to 4 hours and ensure thorough emptying of residual milk. When necessary, apply a warm towel compress to help express any remaining milk.
After using a breast pump, clean the breasts with warm water only—avoid using soap or similar products. It is recommended to use a breast pump and afterward apply a warm compress with a heated towel, which helps prevent milk duct blockage and reduces the risk of mastitis.