You can't experience an imbalance of anything (yeasts) without having a systemic disturbance. The only reason why a microbial overgrowth would occur is if your body has lost its ability to defend against these organisms. Still a constitutional disturbance. You need to locate the underlying source of the problem. Everything else is just temporary symptomatic relief.
Not definate whether this can be identified as an official bowel disorder. In your case, you need to focus on replenishing bowel flora, repairing the lining, and removing pathogens. Observe the skin for changes in the process.
Those without GI conditions need to concentrate attention on other pathological factors.