It's called a hot bowel movement because toxins are being passed and have the unfortunate effect of burning your bottom as it passes. Some people mistakenly think it's the cayanne pepper and cut back on this very important part of our diet, but it is toxins that cause the burning sensation. And we all learn something new everyday concerning this cleanse, and life in general for that matter. Please don't ever hesitate to seek answers to questions...I sure don't :-) Hope this answered your question. Good luck and happy cleansing!!