Changes in your nail health can provide insights into your overall well-being. While minor color variations or vertical ridges with age are normal, certain nail changes may indicate underlying health concerns. Yellow nail syndrome, characterized by yellowing, thickening, and slow growth of nails, can be a sign of cancer, fluid on the lungs, or other conditions. If you observe unexplained changes in nail shape, color, or detachment, or if the skin around your nails becomes inflamed, it’s crucial to seek medical attention.