A month ago, I got these little red dots on my back and stomach. they're really itchy. suddenly, they've transferred into my arms and legs. after sometime they're gone, my skin became "chicken skin". and now when I feel itchy and scratched my legs, red itchy bumps
will appear. They're like mosquito bite
s. But when I stop scratching, they will be gone after few minutes. What could these be? I have been to dermatologist, she gave me ointment and oral med, but still they're not gone.