Red Rash Keto Rash

Hello there,
I start having red rash since day 12 on water fasting, so does anyone have similar experience?? And I watched lot Youtube videos about Keto rash, and some people suggest bile salt, does that work? Can I take it while I am doing water fasting? I don’t want to stop now, someone suggested this, is this working?
Dr. Berg’s Gallbladder Formula Contains Purified Bile Salts,
Thanks!!!