Yes, you are right. That rash you have is a release of kind of toxins. But, it will go away and you will be healthier for having gone through this!
I think the reason you got so constipated was because you didn't drink enough water. It's very important to drink lots of water while taking the B&P shakes.
It sounds like you are using a lot of Dr. Schulze 's wonderful steps to getting healthier. I agree. I love those hot/cold showers. They are great after working out! (I do wait at least 30 minutes before I shower to allow my body to cool down.)