My fingernails keep splitting straight down instead of chipping. What causes this?

While many cases of nail splitting are benign, a persistent vertical split that does not heal or is accompanied by pain, bleeding, or discoloration should be evaluated by a healthcare professional. In rare cases, such splits can be indicative of more serious conditions like melanoma, a type of skin cancer.

Prompt attention to unusual nail changes can facilitate early diagnosis and treatment of potentially serious health issues. Always err on the side of caution and seek professional advice if you have concerns about your nail health.