When you talk of a herx does the symptom also include diarrhea? I Started physical therapy 3 weeks ago and after the first week that I had it 2x/week I started w/ diarrhea. Tried the BRAT diet but that didn't make a difference. The PT is working alot on my stomach muscles. I also feel terrible bloated. Been trying to drink a ton of water. Could the PT be releasing all these toxins to cause this?