I got the keto rash. It’s prurigo pigmentosa. Assuming it’s the same rash I had this is typically the keto rash. I had it for months and it only went away when I took antibiotics. Saw many doctors who didn’t agree with my “self diagnosis” until a doctor finally was like “ok, here are the antibiotics you asked for” and sure enough it went away. I believe I took doxycycline.
The rashes are the worst. If you haven’t tried it I found that blackseed oil and garlic tea helps (from reddit advice). I’ve got some scarring from several years ago when I had it real bad so be careful.. Also airy clothing and not scratching ofc. Hope it goes away soon for you
My guess from reading is that it’s toxins being released and the body can’t deal with too much at once so getting into it more gradually might be a good thing