8 Health Warnings Your Fingernails May Be Sending You

8 Health Warnings Your Fingernails May Be Sending You



We usually take our fingernails for granted unless it’s time to clean them or groom them. While you’re ignoring them, your nails are sending you a message about your health and well-being. If you’ve not given them much thought before, it might be time to pay attention to these 8 health warnings that your fingernails are trying to send you.

Nail Function

Ever get a splinter under your nail? You wonder how something so small can hurt so much? The amount of pain that you feel is due to all of those sensitive nerve endings beneath the surface. Our sense of touch provides valuable information to us about our environment.


Our fingernails are like armor for the nerve endings of the finger. As a hard, protective coating for your fingertip, they provide shelter for the nerves and blood vessels.

In addition to protection, they also enhance our sense of touch.

As you press down to touch something, the nail acts as a surface to push against.



Parts of the Nail

Our fingernails have several working parts. These are the nail root, nail bed, nail plate and cuticle. These structures each have their own part to play in the growth of healthy fingernails.


The nail root is the white half moon of your fingernail. The root generates the growth of the hard fingernail. The nail bed contains the nerves and blood vessels. The hard fingernail plate is made of keratin. The cuticle makes a waterproof barrier between the fingernail plate and the skin of the finger.

Why Our Nails Reflect Health

Since they take time to grow, just like our hair, our fingernails can reflect health problems that happen over time. Dermatologist Christine Poblete-Lopez, MD., says ‘Your nails are a very good reflection of your health. Many things can occur in the nails that can signify systemic or skin problems.’

8 Health Warnings Your Fingernails May Be Sending You


1. Ridges down the nail

Ridges are easily fixed cosmetically by filing. But ridges growing down the length of your fingernail could be a health warning. Ridges can develop in our fingernails naturally as we age but they can also be due to poor nutrition, thyroid disease or even kidney failure.

2. Ridges across the nail

Ridges horizontally across the fingernail can occur at the time of an illness to the rest of the body. The line will continue to grow toward the tip over time but it formed at the time of the illness. Chemotherapy, injury and Reynaud’s disease can also cause horizontal lines to appear on the fingernail.


3. Brittle

Fingernails that break easily can be strengthened by taking B7 supplements (Biotin). Nail fungus, low thyroid or nail psoriasis could also be the cause of brittle nails.

4. Yellow nails

Nails can become discolored due to prolonged use of nail polish, so if you regularly use nail lacquer, it may not be a concern. However, yellow nails can have a much more serious cause. Yellowing of the nails can be a warning sign of lymphodema, tuberculosis or liver disease.

5. Other discoloration

Yellowing is most common, but nails can turn other colors as well. Dark stripes on your fingernail are concerning as they could indicate a form of skin cancer. White lines on the fingernail might be a warning sign of liver disease or malnutrition.


White nails (as opposed to pink past the nail root) are due to low blood flow to the nail bed. White nails can be a warning of liver or kidney disease, heart failure, diabetes, anemia, overactive thyroid or malnutrition.

Dark streaks under the nail that usually run vertically are usually no major health concern. They are most commonly the result of broken blood vessels and a result of injury, not illness.

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