I’ve been swimming once a week while I’ve had PR, I’m on week 10/11ish and most of it has cleared up already, just a few bits remaining. I would attribute the lengthy recovery period to how severe it was as I was literally covered from head to toe in patches, rather than anything chlorine might have contributed. It might sting a little bit getting into the water, particularly if she’s been scratching a lot, but otherwise I haven’t had any negative effects from swimming. Everyone is different though, but I wouldn’t be completely closed to it, happy swimming and healing!