I have recently had a bad case of what some people call "hiker's rash" on my lower legs. It starts just above the sock line. I stopped using liners and don't use wool any more - but it has gotten worse the past few day hikes. It goes away in about a week, but seems to be getting worse - yesterday I had day hikers and short socks and it happened? I worry it will get worse with back packing/consecutive day hikes. Any advice on this condition would be appreciated.