Yea i just got the same thing on my WHOLE chest the doc said he didnt know what the hell it was..and im allergic to grass but ive never had a rash look like this before but its been there for about 3 weeks and its FINALLY going down a little ive been using Caladryl Clear (drying lotion) to it for the past 3 nights and that seems to be working so try it out. and if you find out what it really is let me know [email protected]