The most common cause of vertical stripes is simply aging. As we age, the body’s ability to replace skin cells decreases. This also affects the cells of the nail matrix (the base of the nail), causing uneven keratin production, which leads to stripes.
Nail dehydration
Aging skin tends to dry out, just like nails. Lack of moisture can make nails more brittle and accentuate natural ridges. Regular exposure to water, soap, and cleansers can exacerbate this dryness.
Nutritional deficiencies
Low levels of key nutrients like biotin, iron, zinc, and magnesium can cause nails to become weak and brittle. Because metabolism and nutrient absorption can decline with age, deficiencies become more likely after age 40.
Health condition
In some cases, vertical lines can indicate health issues such as circulatory problems, thyroid dysfunction, or even rheumatoid arthritis. If you notice other symptoms, such as fatigue, brittle hair, or changes in skin texture, it’s worth seeing a doctor.
