Blue lips in 17mo (not urgent)

[Wilkiepedia]

Have meant to post this for AGES

My DS gets very purple/blue lips really easily when he is cold. It can be as simple as sleeping in a cool room and his lips go this colour.

Should I be worried? Can it be a sign of anything more serious.

Sometimes they go this colour when he is in the bath and he definitely isn't cold.

My dd used to do t his. She is 5 now and is fine. I never worried about it, I thought this was just what she did when the temp dropped slightly. Am I a bad mother???

Well I have never bothered about it until my sis has kept going on at me to take him to the drs...

My mum says its a sign of dehydration but I'm not so sure.

Ds3 used to get them and he had a heart murmur when he was little. The blue lips were hsi circulation playing up.
His heart murmur was checked out and was a

I have noticed that when my NCt group and I go swimming (babies 14-ish months) some get clearly very cold / blue lips after they've been in a while, and some don't, so I'd assumed it was just a thing some kids had.