DD3 is 4 weeks old and she’s had this kind of raised patch on her back since she was a few days old (could have been there at birth and I just didn’t notice it straight away) it’s firm it’s not like a blister although it looks a bit like one, wondered if it was some sort of raised birthmark? It’s just above her bum cheek
health visitor says just mention it at 6 week check but just curious what it might be