Foods that cause colon blockages are acid-forming — particularly high-protein diets without enough fiber. This leads to general malaise in the body. The colon's tissue eventually becomes inflamed, reducing its ability to do its job, which is to allow only water, minerals and vitamins to pass into the bloodstream. If yeasts, molds, fungus, bacteria, parasites or fecal material enter the bloodstream and connected tissue, the body's pH will be thrown out of balance.