Re: Child waking from nap with blue lips
I've seen this in toddlers but it's usually because they are cold.
What type of environment is he napping in? At 15 1/2 months their skin isn't as "thick" as an adults. So, what's warm to us may be cold to him. From what I've seen in my own daughter when she gets blue lips it's because she's cold.
Did you ask how long the "blue lips" lasted? Was it just from napping or the whole day even when he's active? If it's there from napping, then his body isn't warm enough. Or his face isn't warm enough.
It probably isn't much to worry about. It's very normal for children to have this. Now if the blue lips don't ever go away, there may be a problem. But if after his naps it goes away then most likely it's ok. As he gets older and he grows, this will disappear. Remember, he's young, with new skin and lots of blood traveling around. Meaning, at this early age, the blood is closer to the surface of the skin and affected by temperature. So, being that there are plenty of blood vessels in the lips, and they get cold fast because of the lack of skin or protective skin with layers of fat like the arms or legs, it tends to get colder faster, thus turning blue. And at sleep, circulation slows down. So, after he wakes up, blood gets moving again this should go away almost immediately. If it lasts longer than an hour after a nap, especially if the child is warm, I would go to a doctor.