Changes in your nails, especially after 40, can sometimes reflect what’s happening inside your body. While some changes are harmless, others may signal underlying health issues that shouldn’t be ignored.

Horizontal grooves, known as “Horizontal lines (Beau’s lines),” can appear after illness, stress, or ongoing conditions like diabetes or circulation problems. They often reflect past disruptions in your body’s normal growth processes.

Vertical ridges are more common with age, but if they become deep or uneven, they may point to deficiencies. The article notes they “could point to nutritional deficiencies like iron or vitamin B12 shortage,” which may need attention.

Dark streaks are more serious. A sudden appearance may indicate melanoma, a dangerous form of skin cancer, and should be checked immediately by a medical professional.

White lines, called “White lines (Muehrcke’s lines),” may be linked to issues such as low protein levels or problems with the liver or kidneys.

Overall, nail changes can act as early warning signs. As the article explains, they “should not be ignored,” especially if they appear suddenly or look unusual. Paying attention to these signs and seeking medical advice when needed can help detect potential health concerns early.