weird rash on arm??

Brooke

Hey ladies, do any of you know what this could be, or have any of you had something similar? I am almost 25 weeks pregnant, and I've had this on my arm for a few weeks now. My OB didnt seem to think anything of it, but its driving me crazy! not to mention it looks awful....could it be eczema? Dont know if its gross enough for the TMI so I'll do it anyway