22 Hard-To-Detect Illnesses, From The Commonplace To The Truly Bizarre

15. Fish Odor Syndrome

Fish odor syndrome is a metabolic disorder that causes the afflicted to give off a strong fishy or body odor through their sweat, urine, or breath. You can shower all you want to no avail, as this disease has absolutely nothing to do with hygiene, whether people around you believe it or not!