She only has them on her 1 arm nowhere else. She has 5 on that 1 arm. I know it’s not bed bugs or fleas. We have pets but they don’t have fleas. I was more nervous about it being spider bites

Do you have pets? Fleas can leave a bite like that if the child is allergic. I’m allergic to fleas and have dealt with that before.

Could it be ant bites?

Having dealt with bed bugs personally I don’t think that’s bed bug bites, I could be wrong. You could lift the mattress and look for them, but I don’t think so. I’m not sure what it is to be honest though

Yeah those look like bedbug bites, they always bite in a pattern or line