massage them before you pump

While you pump, massage your boobs. Or take a hot shower and massage them then pump.

Lay on a heating pad before u pump also do like a deep tissue massage it the hard areas then express the milk it will help I had that issue and was able to correct the issue within 2 days before it got out of hand also feed ur baby a lot on that side and u may have to lay over baby to let gravity play apart that helped for me as well my son could hardly breathe bc milk was coming out so fast when i hovered over him