Breastmilk

Sometimes baby’s need some time after a tongue tie release however if you are wanting to stop

A gentler approach to just stopping is often:
Express or pump just enough to relieve pain, not enough to fully empty your breasts.
Gradually reduce how often and how much you pump over several days.
Wear a supportive (but not overly tight) bra.
Use cold packs or chilled cabbage leaves between feeds/pumping sessions for comfort.
Take pain relief such as ibuprofen or paracetamol if you’re able to take them.
Watch for signs of mastitis: fever, flu-like symptoms, red/hot areas on the breast, or worsening pain. If those occur, contact a healthcare professional promptly.

Have you tried nipple shield that helps as well

Best thing to do if you are wanting to completely stop is to just leave them alone. Wear a supportive bra and try not to stimulate them. Avoid the shower water directly hitting your breasts as that can stimulate milk production too. They will feel hard and tender for a short time but it’s just part of the process unfortunately. xx