I dont know where it came from, but I was in the shower the other day and I felt a raised lump on my back. It's red, and it's been itchy. I can't see it, but it feels like a bug bite that has gotten bigger because i've been itching it here and there, especially when I was sweating this morning (saturday) when I was working at the barn (stables).

Also I have a little itchy small bump on my neck...Should I see a doctor about these things or not?

Also...Can bugs really sting through clothing?