What Your Nails Reveal About Your Health Nail changes can signal nutritional deficiencies or underlying illness. Here are the most common signs to watch for: Beau’s Lines: Horizontal grooves; linked to illness, trauma, or zinc deficiency. Clubbing: Downward-curved nails with swollen fingertips; often signals heart or lung disease. Spoon Nails (Koilonychia): Thin, concave nails; usually from iron-deficiency anemia. Nail Pitting: Tiny dents; common in psoriasis, eczema, or alopecia areata. Dark Streaks: Could be melanoma; seek medical advice. Terry’s Nails: Mostly white with a red tip; may suggest liver or heart disease. Yellow Nails: Often from fungal infections; treat with antifungals or home remedies like tea tree oil. Tip: See a doctor if nail changes persist or come with other symptoms like fatigue, weight loss, or swelling
