What do you think this is ?

It’s been going on for a few days now

Went to dr and he doesn’t seem concerned just to keep an eye on it - as I haven’t changed anything environmentally or food wise etc nothing has changed.

I know dr isn’t worried, but the unknown makes me nervous...

any ideas

My baby is 5 months

The spots go from one area to another they appear as fast as they disappear

Chest, cheeks, ears, neck, arms, legs

Not all at once but it’ll be bad in one area and than slow down and move around

Any ideas ?