It's ALL tied in with the liver. Which is tied in to the gallbladder. Taking out the gallbladder has just solved the gallstone crisis, now you have the chronic (liver stone) blocked/congested bile scenario. And that causes digestive/constipation issues. btw, constipation includes the kind of BMs you are talking about. The skin issues is simply the boy's way of dealing with the clogging and its effects. That you had the gallbladder out is proof the liver needs help.
Doctors don't know about all this. You would not need a dermatologist if the liver was clean and clear and producing bile that got to your digestion, thus allowing you to digest and assimilate what you eat. It's all linked. Take back your life.
Please google/read, before flushing: The Amazing Liver and Gallbladder Flush. Yes, You can do it, even without a gallbladder.
* Please also read the RRR'd post I just re-posted. It speaks to the parasite question/situation. Very wise stuff!!!