If you’ve noticed ridges in your fingernails, you’re not alone—and in many cases, they’re completely harmless. Fingernails can develop ridges for a variety of reasons, ranging from natural aging to minor health or lifestyle factors.

Vertical ridges, which run from the cuticle to the tip of the nail, are the most common. They often become more noticeable with age as nail growth slows and moisture levels change. Dehydration, frequent handwashing, or exposure to harsh chemicals can also make these ridges stand out more.

Horizontal ridges, also known as Beau’s lines, may signal something more significant. These grooves can appear after illness, high fever, injury to the nail, or periods of intense physical or emotional stress. In some cases, they may be linked to nutritional deficiencies or underlying medical conditions that temporarily disrupted nail growth.

Ridges can also be associated with deficiencies in nutrients such as iron, zinc, or biotin. Brittle nails, discoloration, or changes in thickness alongside ridges may point to the need for dietary adjustments or medical evaluation.

While most nail ridges are not a cause for concern, you should consult a healthcare professional if they appear suddenly, worsen rapidly, or are accompanied by pain, nail separation, or color changes.

Bottom line: Fingernail ridges are usually normal and often reflect aging or minor changes in nail health. Paying attention to sudden or unusual changes can help identify when it’s time to seek professional advice.