Picked up something in Ecuador, in 2004. The skin, in an area as round and deep as a nickel, opened up and itched profusely... Disappeared after several days...Resurfaces each and every year...The skin doesn t open up, but the area itches profusely and welts up...Now, there are several spots in the same area, and they resurface 2 or 3 times each and every year...Always accompanied by an over all feeling like the flu (minus fever )