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

Consider supplementation if deficiencies are confirmed by a healthcare professional.

4.3 Medical Intervention

Dermatologist evaluation: Necessary if nail splitting is persistent, painful, or accompanied by discoloration.

Treatment of underlying conditions: Managing thyroid disorders, psoriasis, or eczema can improve nail integrity.

5. Summary

Vertical nail splitting, although often mistaken for simple nail brittleness, is usually a sign of underlying structural weakness. Its causes are multifactorial, including mechanical stress, hydration imbalance, nutritional deficiencies, and medical conditions. Unlike chipping, which is typically caused by trauma, longitudinal splitting indicates a compromise in the internal keratin layers of the nail.

Preventive strategies focus on maintaining hydration, protecting nails from chemical and physical damage, and ensuring adequate nutrition. Persistent or severe cases require medical evaluation to rule out systemic disease. By understanding the anatomy, causes, and mechanisms of vertical splitting, individuals can take proactive steps to maintain healthy, resilient nails.

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