Can an Iron Deficiency Cause Your Fingernails to Curve Completely Upwards?
1. Introduction Severe iron deficiency can indeed cause fingernails to curve completely upwards, a structural abnormality clinically known as koilonychia. This distinctive spoon-shaped deformity occurs when inadequate iron stores disrupt the cellular matrix and blood supply of the nail bed, weakening the nail plate until it inverts. Recognizing this symptom is a crucial diagnostic clue … Read more