Girls good night everyone! I can't fall asleep right now, I noticed th…

Girls good night everyone! I can't fall asleep right now, I noticed that my son has ribs sticking out. He is thin, maybe because of this I don't know. I dug into Google, it says about rickets on there. Damn, got scared. Do your kids, especially skinny ones, have their ribs sticking out too? Or is this not normal?