Chloe had weird hands

Every once in a while Chloe gets a weird rash on her hands/arms. It is weird. Here is a picture of it:

It usually goes away after a half-hour or so. If you have a Ph.D. we will take your thoughts on what it is and how to take care of it. We do not go to a doctor becuase by the time we got to the office the rash would be gone. I am saving this picture on my blackberry for the next time we go to the doctors.