Parasites. Parasites, another cause of IBS symptoms, can cause diarrhea, constipation, gas, bloating, cramps, nausea, poor digestion, fatigue, muscle aches, bleeding, rectal itching, and abdominal pain. Parasites cannot live without you. If you are embarking on a natural treatment for Candida, fungi or parasites, remove all sources of natural sugar from you diet, including sources like honey and fruits. … Diatomaceous Earth–Continue reading “NAC, activated charcoal , sleep and parasites”