In an interview with HT lifestyle, Dr Ruben Bhasin Passi, consultant, dermatology, CK Birla Hospital, Gurugram said, "Nail colour, shape, texture, or thickness can change to signal nutritional deficiencies, infections, or even systemic diseases. While mild, transient changes in nails may be benign, persistent or abrupt changes usually require medical evaluation." Your DIY nail care guide: Basic steps to salon-like strong and beautiful manicured nails Here's how to spot health clues from your nails: 1. Pale or white nails Could be a sign of anemia, liver disease, heart disease, or malnutrition. 2. Yellow nails Usually due to fungal infections. Long-standing yellowing can indicate lung disease, thyroid disease, or diabetes. 3. Bluish nails Can mean low oxygen levels from heart or lung disease. 4. Brittle or split nails General from repeated exposure to water or chemicals and can also mean hypothyroidism or biotin deficiency. 5. Pitting (small depressions) Linked with psoriasis, eczema, or alopecia areata. 6. Spoon-shaped nails (koilonychia) Can indicate iron-deficiency anemia or liver disease. 7. Horizontal ridges (beau's lines) Frequently associated with serious illness, high temperature, or convalescence from illness such as COVID-19. 8. Vertical ridges Normal age change, but sudden highlight may indicate nutritional deficiencies. 9. Clubbing Bulbous tips of fingers with curved nails, typically associated with chronic lung or heart disease. 10. Dark streaks or spots May be harmless pigmentation, but a solitary, broadening streak could be melanoma. 11. Nail separation from nail bed (onycholysis) May be due to trauma, fungal disease, psoriasis, or thyroid condition. "Your nails are like silent messengers, echoing what's going on inside your body. Although not all changes herald serious issues, changes noticed or that persist should never be taken lightly. Care of nails on a regular basis, eating well, and prompt dermatological visit can keep your nails and your body healthy," said Dr Ruben Bhasin Passi.