There is a nationwide spike in cyclosporiasis, a parasitic intestinal illness characterized by frequent, sometimes explosive, diarrhea. But how does one know if it’s the parasite or just bad diarrhea?

Paradoxical diarrhea happens when loose, watery stool finds a way around hardened, impacted stool in your colon and leaks from your anus. Also called overflow diarrhea, it’s often a symptom of a type ...