I have a rash like that all across my wrist. I was clear cutting my backyard to get rid of poison ivy and other weeds--and I've never got poison ivy before even though I've been in it a number of times. Having work done on my house and the workers came in today and said they have poison Oak on them. I told them I didn't think there was poison oak in Western PA, but there might be poison sumac. Not sure what it looks like, but the rash on my wrist has been there for 7 days. Just started using Caladryl Clear on it yesterday and it seems to be helping--better than hydrocoritone cream.