As people get older, changes in the body are normal, including changes in the nails.
But after the age of 40, some nail changes can sometimes point to underlying health issues, especially if they appear suddenly or look unusual.
Here are a few types of nail lines and what they may be associated with:
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Horizontal lines (Beau’s lines)
These horizontal indentations can sometimes appear after illness, strong physical stress, or long-term health conditions like diabetes or circulation problems.
Vertical ridges
Vertical lines are often a normal part of aging. However, if they become very deep or uneven, they may sometimes be linked to nutrient deficiencies such as low iron or vitamin B12 levels.
Dark streaks
A dark line or streak that appears suddenly on the nail should not be ignored. In some cases, it may be linked to melanoma, a serious form of skin cancer, and should be checked by a doctor immediately.
White lines (Muehrcke’s lines)
White lines across the nails may sometimes be connected to liver or kidney issues, or low protein levels in the body.
Final note
After 40, it’s important not to ignore changes in your nails, especially if they appear suddenly or look unusual. While many nail changes are harmless, some can act as early warning signs of health problems. If something looks different or concerning, it’s always best to get it checked by a healthcare professional.