This question is regarding any type of rash that you can get while you are hiking or backpacking, for the record. This can include anything from poison oak to only the fluid content that can be found in blisters. You may have heard that this kind of stuff can be contagious.
Well, that pretty much is false as once the oil that spreads the rash has been removed, it can’t be covered anymore. So, in theory, you could technically get some of the oil on your skin from someone else.