Brittle Nails: Causes, Prevention, and Expert Care Tips

Brittle nails (onychoschizia) involve splitting, peeling, and fragility. Causes are multifactorial, ranging from environmental exposures to systemic conditions.

Common Causes

• Dehydration (insufficient water, low humidity)
• Nutrient deficiencies (biotin, iron, zinc, vitamins A, C, D)
• Frequent wet work, harsh chemicals (cleaners, acetone removers)
• Excessive manicures, gel/acrylic nails
• Aging (reduced lipid content, slower growth)
• Medical: hypothyroidism, anemia, psoriasis, lichen planus, Raynaud's
• Medications: retinoids, chemotherapy
• Trauma: nail biting, picking, mechanical stress

Care and Prevention Strategies

1. Hydrate: drink water; use a humidifier.
2. Balanced diet + consider biotin 2.5–5 mg/day (evidence modest).
3. Gentle nail care: acetone-free remover; limit polish; use base coat.
4. File in one direction; avoid over-filing.
5. Wear gloves for wet work and chemicals.
6. Moisturize nails and cuticles daily (urea, lanolin, oils).
7. Don't bite or pick.
8. Take polish breaks.
9. Treat underlying conditions.
10. Limit prolonged water immersion.
11. Trim regularly; avoid extreme lengths.
12. Protect from temperature extremes.
13. Gentle cuticle massage with oil.
14. See a dermatologist if persistent, painful, or associated with systemic symptoms.

Improvement takes months (nail growth ~3 mm/month). Consistency is key.