i would definitely get it checked out with a doctor - dont know anything about being related to inhaler though. Dont want to worry you but i know there is some kind of rash which can relate to something to do with the liver so best to be on the safe side. I've given up with NHS direct as they are run only by nurses and at the end of the day will only tell you to ring your doctors. Sorry that is just my opinion.
Hope i havent worried you too much - i'm sure everything is fine.
let us know how you get on!