1. Introduction Fingernails splitting horizontally down the middle is a clinical sign indicating structural damage to the nail plate, most commonly caused by repeated cycles of wetting and drying, physical trauma, or nutritional deficiencies. This condition is medically known as onychoschizia. When the intracellular adhesion within the nail matrix is compromised, the layers of keratin … Read more
1. Introduction Fingernails break and split straight down the middle due to a clinical condition known as onychorrhexis, which is characterized by longitudinal ridging and a loss of intercellular adhesion within the keratin matrix of the nail plate. This structural compromise is most frequently caused by repetitive cycles of wetting and drying the hands, chronic … Read more
1. Introduction A fingernail that splits vertically straight down the middle is a structural failure of the nail plate clinically termed onychorrhexis. This specific pattern of damage occurs when the linear keratin fibers that form the nail lose their moisture and structural integrity, often due to repetitive environmental dehydration, advancing age, or subtle systemic imbalances … Read more