Rashes ??

I keep getting the same rash on my wrists and elbows.. my first pregnancy I had very dry and itchy skin but no rash. Oddly these are the areas where I had my blood drawn the other day in the hospital. I have an appointment with OB in a few days so trying not to stress but this is driving me crazy. The rash is red with small bumps and itches but I don’t scratch it.