How can I prevent lines from forming in my nails?

Vertical or horizontal lines in your nails can often be prevented with a few simple habits. To keep nails smooth and healthy:

• Protect nails from injury: Wear gloves during cleaning or manual work, and avoid biting or picking at cuticles.
• Maintain good nutrition: Eat a balanced diet rich in biotin, iron, zinc, and protein to support strong nail growth.
• Stay hydrated: Moisturize nails and cuticles regularly to prevent brittleness and ridging.
• Manage stress and illness: Since major illness or stress can trigger nail lines (like Beau's lines), prioritize rest and overall wellness.
• Limit harsh chemicals: Avoid frequent use of nail polish removers containing acetone.

If you've already noticed lines in your nails, they may point to an underlying issue worth exploring — from nutrient deficiencies to thyroid concerns or past illness. Understanding the cause is the first step to fixing it. Take a free, instant, online symptom check to get personalized insights about what your nails may be telling you and clear guidance on your next steps.

Reviewed for medical accuracy: 07/15/2026