What could this be??

I noticed my little guy was getting little red bumps on his cheek (he won’t let me take a picture of it) and then yesterday I noticed more on his back and right side and chest/stomach. He has a stuffy nose but that’s it. I plan on calling the doctor tomorrow, but I wasn’t sure if anyone had an idea of what it could be. 😞😞

The red lines are from his sleeper because he just woke up from his nap.