The rash is made up of flat pink splodges - not big, about the size of insect bites. It is only on my truck - in fact, where my ribs are, as it extends round my sides, but there isn't any on my abdomen. It doesn't hurt and isn't itchy, but looks a bit oddd - I don't tend to get skin irritations and have no allergies I am aware of.
Any ideas what it could be ?