Purplish spot appeared on LO face overnight, help!

oh mama, I understand your worry, purple or reddish spots appearing overnight can really make any parent anxious! Someone in my mum group mentioned that there are actually a few possible causes ranging from something fairly harmless like a burst blood vessel from crying or straining, all the way to things that need quicker attention like petechiae (tiny pinpoint spots that don't fade when you press on them), which can sometimes signal something that needs urgent checking. The key thing people say is to do the "glass test", press a clear glass firmly against the spot and if the colour doesn't fade at all, that's when you really want to go to the doctor sooner rather than later. It's hard to say for sure without seeing it in person, and since spots on the face can have quite different causes, it's really worth getting your PD or a doctor to take a look quickly just to rule out anything serious.