This condition is known as breast engorgement
. This is a normal physiological phenomenon due to increased milk production and it gets aggravated if the baby does not suckle properly... Once engorgement is obvious then the baby may find it difficult to suckle at breast, thats why the baby has difficulty in feeding...
It can be managed by giving hot water massage
to breast before feeding and cold
compresses after feeding to reduce swelling and pain/express the breast milk manually or by breast pump
if the engorgement is more till the baby can suckle. The breast feeding should be continued, if breast feeding is stopped the condition will become worse.
If there is any fever
it means there is infection and it needs treatment with an antibiotic...