I have had this rash for about 4 weeks now it and it is really getting annoying. I will break out sometimes into blotchy red intensely itchy rash. After sitting for a long while I will get it on the lower buttock and back of my thighs. But it is not uncommon for it to show up on my back, sides, and knees. I saw that it is sometimes associated with a bump at the center, but not always. On my thighs it normally has a bunch of red dots with it too.
I am going to a doctor soon, but all I have done so far is try Calamine Lotion with not very much success.

Thanks in advance for any help figuring out what this is.