When nails split straight down, it is often referred to as onychorrhexis. This condition is characterized by the presence of longitudinal ridges and splits, which can be painful and unsightly. Unlike horizontal splits that occur at the free edge of the nail due to external trauma, vertical splits often suggest deeper structural issues within the nail matrix where the nail originates.
Vertical splitting can be an indicator of nutritional deficiencies, chronic exposure to moisture or chemicals, or underlying medical conditions. It’s essential to pay attention to other accompanying symptoms, such as discoloration or changes in nail thickness, to determine the root cause of the issue. Consulting with a healthcare professional can help diagnose the problem accurately.