Hi I 49 and have had cfs for many years. Over the last 2 months have developed a sore,red, flat non itchy rash between the buttocks similiar to chaffing but not caused by exercise. It can be cleared with a strong anti-inflammatory cream but can return quickly...my doctor says it's like nappy rash or contact dermatitis! I can't think of what might be causing it besides another glitch in my immune system! Has antone else experienced symptoms like this?