“Possible autoimmune disease?”

I have been diagnosed with chronic urticaria and angioedema in the past 2 years, and while it’s not exactly chronic anymore I still have flare-ups. My provider believes it’s some sort of autoimmune disorder. We have yet to find anything. I also have experienced blotchy legs after showering. When younger I was diagnosed with eczema, and had reoccurring UTIs which are no longer frequent but when I did have them there was sometimes blood in my urine. I’ve also had recurring ingrown toenails for the last 10 years. I’m not sure if all of this information is necessary, but thought I’d add it incase it was. Just wanted a new second opinion.