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Signs: Pitted nails, discoloration, or thickening.
Fast fix:
See a dermatologist for targeted treatment (topical or systemic)
Nail improvement often follows skin improvement (4–12 weeks+)
9. Fungal Infections
Onychomycosis can make nails thick, crumbly, yellow, or brittle.
Signs: Yellow/brown discoloration, thickening, debris under nail.
Fast fix:
Over-the-counter antifungal creams for mild cases
Prescription oral or topical meds for moderate–severe (dermatologist visit recommended)
10. Aging and Repeated Minor Trauma
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Natural aging reduces oil production; using nails as “tools” adds cumulative damage.
Signs: General dryness, slow growth, easy splitting.
Fast fix:
Keep nails trimmed short
Moisturize cuticles twice daily with oil or thick cream
Avoid using nails to open cans/packages
Quick-Reference Table: Causes, Signs & Timelines
Cause Key Signs Practical Fix Typical Improvement Time
Biotin deficiency Splitting, peeling Biotin-rich foods + supplement 4–8 weeks
Iron deficiency Pale, spoon-shaped Iron-rich foods + possible supplement 2–6 months
Low protein Soft, bendy Balanced protein intake 6–12 weeks
Dehydration Rigid, snaps easily Consistent water intake Days–weeks