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

What makes medical conditions like high blood pressure or cholesterol extra scary is that you can have them without knowing. However, these commonplace illnesses are not the only ones that can strike without warning. The world is full of terrifying afflictions that are hard to detect, from well-known diseases, to crazy syndromes you’ve never heard about.

1. Celiac Disease

While gluten-free diets have become trendy for those unaffected by celiac disease, it is especially important for those who do have it. Celiac disease is an autoimmune disorder triggered by gluten that can lead to fatigue, joint pains, migraines, or even depression. There are 200 possible symptoms for celiacs, and many people suffer without even knowing they are afflicted.