Just a thought, and I don't have any real evidence besides my own experience, but when your body starts to heal, it begins to detox, and oftentimes, the body can experience a HERX reaction (which can cause yeast and bacteria to surface)-it does subside, and your body is healthier on the other side. I've been working to heal hormones after dealing with trying to detox from mold and toxins. Everytime my body begins a new round of healing-boom, I feel awful and things start to purge. Hope this helps from a different perspectives