I've been getting a rash like this on and off for the past year. They show up only on my legs but always in different places/patterns. I haven't noticed anything particular that could be triggering it. I'll get a patch or two on my leg, it'll last about a week then fade away slowly before I get a new patch somewhere else. I do have a history of autoimmune conditions but none of my doctors say it's related to that. I also get routine bloodwork with blood counts and those have been normal. I haven't changed anything at all in my routine, detergents, soap, clothing and bedding are all the same. I have been mostly just ignoring it but the fact that it's been going on so long is strange and I'd like to know what it is. All the images are separate ocassions of the rash. I've had dozens like these over the course of the last year.