How your fingernails can signal serious health conditions like heart and liver disease

Fingernails aren’t just a cosmetic feature; they are a mirror reflecting your internal health. Typically, healthy nails are smooth, slightly curved, and light pink with a clearly defined lunula (the half-moon shape near the base). However, changes in colour, texture, or shape may indicate deeper issues, from vitamin deficiencies to heart or liver conditions. According to dermatologists and health studies, nail abnormalities often appear before other symptoms, offering early warning signs of systemic problems. By regularly observing your nails and maintaining a healthy lifestyle, you can detect and address potential concerns before they become much more serious.Like the skin and lips, nails provide visual cues about what’s happening inside the body. Changes in nail appearance, such as ridges, discolouration, brittleness, or thickening, may be linked to poor circulation, immune dysfunction, nutritional imbalances, or organ-related diseases. A study published in the Clinical Dermatology Review has shown that fingernail changes can indicate conditions such as anaemia, thyroid disorders, diabetes, or liver disease. Paying attention to nail health is more than cosmetic, it’s a diagnostic tool for your body’s overall condition.Pale or white nails may point to anaemia, malnutrition, or liver disease. If the entire nail appears white with a darker rim, it may be a sign of Terry’s nails, commonly associated with liver failure, kidney issues, or heart problems. Medical evaluation is advised if this discolouration is persistent.While sometimes caused by nail polish or fungal infections, persistently yellow nails could indicate more serious conditions like thyroid disease, diabetes, or respiratory illness. Yellow nail syndrome, where nails become thick, discoloured, and grow slowly, can signal lymphatic or lung disorders.These horizontal grooves or ridges across the nail plate may follow a period of illness, injury, or extreme stress. They’re often linked to systemic conditions such as high fever, diabetes, or zinc deficiency. Their presence means nail growth was temporarily disrupted.When nails curve around the fingertips and the nail bed becomes soft and spongy, it may be a sign of chronic low oxygen levels in the body. Clubbing can be associated with lung disease, heart conditions, or inflammatory bowel disease, and should be medically evaluated.Brittle nails that crack or split easily may point to thyroid problems, iron deficiency, or chronic dehydration. Repeated exposure to water, harsh cleaning chemicals, or excessive manicuring can worsen the condition.A dark stripe running from the base to the tip of the nail (especially if new or changing) could signal subungual melanoma, a form of skin cancer. This sign should not be ignored, especially if the streak appears suddenly or is only on one nail. Other warning signs include discoloration, nail splitting, pain, or changes in the surrounding skin or cuticle, prompt evaluation is essential.Pay attention to persistent or unusual changes, such as dark stripes, splinter haemorrhages, pitted or cratered nails, or nail separation. These may warrant timely evaluation for skin cancer, systemic disease, or chronic infection Especially urgent signs include:Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. If you notice persistent or unusual changes in your nails, please consult a healthcare professional for proper diagnosis and treatment.Also read | Your persistent cough be a hidden sign of heart disease; what you need to know