Ridges on nails are a common occurrence and can appear as vertical or horizontal lines.
“Ridges on nails are a common occurrence and can appear as vertical or horizontal lines.” They are usually harmless, but in some cases may point to underlying health concerns.

Vertical ridges often develop with age.
“Vertical ridges typically run from the cuticle to the tip of the nail.” They are most commonly linked to aging, as nails lose moisture over time. In some cases, they can also be caused by minor trauma or a lack of key nutrients needed for healthy nail growth.

Horizontal ridges are less common and more concerning.
“Horizontal ridges, also known as Beau’s lines, are less common and can be more concerning.” These may signal that nail growth has been temporarily disrupted due to serious illness, poor nutrition, or medical treatments like chemotherapy. If they appear suddenly or persist, it may be wise to seek medical advice.
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Nutritional balance also plays an important role in nail health.
“Nutrient deficiencies can also contribute to the formation of ridges on your nails.” A lack of biotin, B vitamins, iron, zinc, or protein can weaken nails and lead to visible ridges. Eating a well-balanced diet helps support stronger and healthier nail growth.

Some ridges may also be linked to broader health conditions.
“Underlying health conditions such as thyroid disorders, diabetes, or skin conditions such as eczema can also cause ridges to form on your nails.” In some cases, nail changes can be an early sign of internal health issues, so persistent or unusual changes should not be ignored.