Sounds like blocked ducts, I had it last week. Give it a Google, it can turn into mastitis but if you keep feeding through it with some gentle massage usually clears up. There's stuff online as well about hot and cold compresses, I forget the detail
@Carole I’ve got a temp too and sore throat not sure if all related feeding is giving me no relief. My nipple looks all lumpy too x
Ibuprofen, cold compress (I used a baby sock filled with rice) or just wrapped ice and very very gentle massage. Continue feeding as normal, lots of fluid and rest.
How old was your wee one? I thought that happened when baby was younger. I don’t breastfeed as much on side that’s sore mind you x