Hi, this has been bothering me for months and my dermatologist doesn't seem to know what to make of it as well. I often just get allergy attacks or something on my skin. It's huge bumps and the size varies.. Sometimes there are little bumps, big circle bumps or random shapes. Sometimes it's only on my arms, sometimes on my back or both, sometimes on my hands or fingers, my legs, my butt, everywhere! It's so frustrating because it's not rashes. It's like ant bites. It often appears at night time. Please help. Thank you!