Brittle Nails: Symptoms, Causes, and Treatment

Nails often get brittler as a person gets older. Brittle nails are more prone to damage, such as splitting or peeling. This condition is also called onychoschizia.

Brittle nails are often a typical part of aging. However, there are also several products and health conditions that can damage and weaken your nails. Learn more about brittle nails, including symptoms, causes, and treatment options.

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Brittle nails affect up to 20% of the population. They are more common among women and people over 50 years old.

Brittle nails are typically thin, weak, and fragile. You might notice that it's easier for them to split, bend, break, chip, tear, crack, or peel. They can be either dry or soft, and they may look "worn down."

When your nails become brittle, it might take longer for them to grow and heal. Brittle nails also sometimes accompany other signs of nail problems, such as discoloration, pits, jagged edges, or a rough surface.

Nails are made out of a protein called keratin, which also helps to form our hair and the outermost layer of our skin.

In many cases, nails naturally become more brittle as we age. However, this is sometimes an indication of an underlying problem affecting your nail health.

Other possible causes of brittle nails include:

There are several ways you can protect your nails against getting brittle and less healthy over time. These steps include:

If your brittle nails are caused by another health problem, such as hypothyroidism, treating that condition directly will most likely improve the appearance and strength of your nails. Follow the advice of a healthcare provider correct any vitamin deficiencies or other problems that could be affecting your nails and/or skin.

On their own, brittle nails typically aren't a sign of a serious health condition. If your symptoms are bothering you, a board-certified dermatologist can help to advise you about how to improve your nail health.

However, you should see a healthcare provider if your brittle nails are accompanied by other symptoms, such as dizziness or fatigue. This can be a sign that your nail problems are due to an underlying condition like iron deficiency anemia.

If you notice that your nails are getting brittle and weak or are starting to break more easily, you’re not alone. Brittle nails are a common problem associated with normal aging.

In some cases, your nails may be brittle because of another health condition–such as anemia, a zinc deficiency, Raynaud's syndrome, or a thyroid disorder–or exposure to either too much or too little moisture. Frequent exposure to cleaning products and excessive hand-washing can also weaken your nails over time.

You can protect your nails by shaping and filing them regularly, applying lotion, taking biotin supplements, and wearing gloves while doing household chores. A dermatologist can advise you on ideal nail care tips. Talk to your healthcare provider if you think your nails may be brittle because of another health concern.

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MedlinePlus. Nail abnormalities.

National Health Service. Raynaud's.

American Academy of Dermatology Association. What is nail psoriasis, and how can I treat it?.

American Academy of Dermatology Association. Artificial nails: dermatologists’ tips for reducing nail damage.

By Laura DorwartLaura Dorwart is a health journalist with a focus on mental health, pregnancy-related conditions, and disability rights. Her writing has been published in VICE, SELF, The New York Times, The Guardian, and many more.