I have been on steroids since Oct 2015 and am now on 3 mg. I have had no major problems . Yesterday I did low impact aerobics which involves moving raising arms and neck etc . When I came home my neck on one side has a vivid red rash which feels like sunburn and has what I would describe as welts across. I have been going to this class quite regularly since before Christmas and this is the first time this has happened. I was wondering if this has happened to anyone else and could it be that my skin has changed because of the steroids?