What your nail color and shape say about your health

Your fingernails can tell you more than you think about your overall health. While changes in nail color, shape or texture are often harmless, sometimes they can signal something bigger.

“Your fingernails offer a glimpse into your body’s overall health,” says Dr. Linda Serrano, a dermatologist with Aurora Health Care. “While most changes are common, they sometimes help us pick up on medical issues.”

Why do your fingernails offer clues to your health? Healthy nails depend on your body’s ability to supply keratin proteins and essential nutrients, like zinc, iron and magnesium. When your body lacks these, it can show up in your nails.

Common nail changes that may signal health conditions include:

• Pale or whitish nails: Can be linked to anemia or liver disease.
• Yellow nails: May develop with fungal infections, lung disease or issues with your circulation.
• Spoon-shaped nails: Thin nails that curve upward may be a sign of iron deficiency.
• Pitted or ridged nails: Can occur with psoriasis, eczema or other skin conditions.
• Clubbing in the nails: Nails that curve around the fingertips could be a sign of lung or heart disease.
• Dark brown or black streaks: Could be a sign of subungual melanoma, a rare form of cancer.
• Lines, splitting or thickened nails: Can be related to infections, uncontrolled diabetes and nutritional deficiencies.

If you notice any of these changes, should you be alarmed? Not necessarily, according to Dr. Serrano. “Sometimes, changes show up simply with age, and that’s perfectly normal. Your nail health could also be due to a minor injury or even a medication,” explains Dr. Serrano.

If you notice sudden or persistent changes in your nails, especially if accompanied by other symptoms, it’s worth scheduling an appointment. “Paying attention to changes and talking with your primary care provider can help catch issues early,” adds Dr. Serrano.

Are you trying to find a doctor? Find one in Illinois or Wisconsin.