there are 2 ways 1 you sweat in the place you want a rash or this may sound disgusting but if you can't sweat where you want a rash, sweat and then rub it there
step 1. Find industrial strength sulfuric acid.2. pour industrial strength sulfuric acid on head.3. relief from itchy rash as you are now dying4. Die5. Get put in ground.6. make sure will is changed...