Help! Losing hair!

My son is losing his hair. I noticed a few weeks ago that he was shedding more than usual but didn't really think anything of it until a couple weeks ago when I noticed in the bath that the top of his head is SIGNIFICANTLY thinner to the point you can pretty much see his scalp..

I also just discovered another little bald spot on the back of his head tonight 😭😭

I've read it could be ringworm but he has no rash/flakes/discolored skin or anything. I've also read nutrient deficiency but he eats really well.

He isn't stressed and he has no symptoms of celiac, diabetes or hypothyroid..

What the heck is going on?! I'm so scared he's going to go bald and I'm also scared he's going to start to notice his hair soon.. 😟