It hurt and my boob got a little bit red where it was clogged. Hot shower or hot towel on it and keep having your baby feed on that side! It won't hurt the baby at all and the sucking will help dislodge the clog in the duct.

Painful! It hurts to touch it. I took a hot shower & had my husband massage it with pressure even though it hurt while I was letting the hot water run on it.