Biotin (B7) deficiency
Iron deficiency anemia
✅ Fix it: Use gloves when cleaning, moisturize daily, and consider a biotin supplement (after consulting your doctor).
2. Vertical Ridges (Up-and-Down Lines)
Common in: Older adults — often just a sign of aging
But if sudden or deep: Could signal vitamin B12 deficiency , iron deficiency , or psoriasis
✅ Tip: If ridges come with discoloration or pain, see a dermatologist.
3. White Spots or Specks (Leukonychia)
Myth: Caused by lack of calcium (not true!)
Real causes:
Minor trauma (bumping your nail)
Zinc deficiency
Allergic reactions to nail products
✅ These usually grow out on their own — but recurring spots may need a nutrient check.
4. Yellow or Thickened Nails
Common causes:
Fungal infection (most common)
Smoking (nicotine stains)
Psoriasis or thyroid disease
In rare cases, lung disease or diabetes
If nails thicken and yellow without trauma, see a doctor — don’t just cover it with polish.
5. Spoon-Shaped Nails (Koilonychia)
Nails curve upward like a spoon — can even hold a drop of water
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