
Ridges in your fingernails can be a sign of ageing, but they can also indicate a current or past illness, injury, or skin condition. Beau's lines are horizontal ridges that can be a sign of a serious condition.
| Characteristics | Values |
|---|---|
| Direction | Vertical or horizontal |
| Cause | Ageing, malnutrition, serious nail injury, Beau's lines, nutrient deficiency, vitamin deficiency, diabetes, illness, injury, skin condition, stress |
| Treatment | Treating the underlying cause will allow new, smooth nails to grow again |
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What You'll Learn
- Beau's lines are horizontal ridges or dents in one or more nails, caused by an illness, injury or skin condition interrupting nail growth
- Ridges in nails can be a sign of a health condition or previous injury
- A dark line on your nail can be caused by a nail injury, infection or cancer
- Multiple Beau's lines on each nail may indicate that an illness or trauma has occurred more than once
- Thicker Beau's lines may be a sign that an illness or trauma lasted a long time

Beau's lines are horizontal ridges or dents in one or more nails, caused by an illness, injury or skin condition interrupting nail growth
Beau's lines are a type of ridge that can appear in your nails. Ridges in your nails are usually harmless but can mean different things. Vertical ridges are often a sign of ageing, while horizontal ridges can point to issues like malnutrition, serious nail injury, or Beau's lines. Beau's lines are deep horizontal ridges and may suggest a serious condition.
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Ridges in nails can be a sign of a health condition or previous injury
The thickness and number of Beau’s lines also provide clues about the cause: A single Beau’s line on one nail may indicate an injury that affected only one finger or toe. Beau’s lines on all of your nails can mean that an illness or stress caused them. Multiple Beau’s lines on each nail may mean that an illness or trauma happened more than once. Thicker Beau’s lines may be a sign that an illness or trauma lasted a longer time.
Ridges in your nails are usually harmless but can mean different things. They may also happen if you have a nutrient deficiency. Your provider can help you determine why you have ridges in your nails. Usually, your nails will become smoother if you treat the underlying cause.
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A dark line on your nail can be caused by a nail injury, infection or cancer
Ridges in your fingernails can be harmless, but they can also indicate a variety of health issues. Vertical ridges are often a sign of ageing, while horizontal ridges can point to malnutrition, serious nail injury, or Beau's lines. Beau's lines are horizontal ridges or dents in one or more of your fingernails or toenails. They indicate that an illness, injury, or skin condition interrupted your nail growth. A single Beau's line on one nail may indicate an injury that affected only one finger or toe. Beau's lines on all of your nails can mean that an illness or stress caused them. Multiple Beau's lines on each nail may mean that an illness or trauma happened more than once. Thicker Beau's lines may be a sign that an illness or trauma lasted a longer time.
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Multiple Beau's lines on each nail may indicate that an illness or trauma has occurred more than once
Ridges in your fingernails or toenails can be a sign of a current or past illness. Beau's lines are horizontal ridges or dents in one or more of your fingernails or toenails. They're a sign that an illness, injury or skin condition interrupted your nail growth. Beau's lines on all of your nails can mean that an illness or stress caused them. Multiple Beau's lines on each nail may indicate that an illness or trauma has occurred more than once. Thicker Beau's lines may be a sign that an illness or trauma lasted a longer time. Treating the underlying cause will allow new, smooth nails to grow again.
Your healthcare provider or dermatologist may diagnose Beau's lines by examining your nails and taking a health history. The thickness and number of Beau's lines also provide clues about the cause. A single Beau's line on one nail may indicate an injury that affected only one finger or toe.
Vertical ridges are often a sign of ageing, while horizontal ridges can point to issues like malnutrition, serious nail injury, or Beau's lines. Ridges in the fingernails are usually signs of ageing. In some cases, ridges may be a sign of health problems like vitamin deficiencies or diabetes.
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Thicker Beau's lines may be a sign that an illness or trauma lasted a long time
Beau's lines are horizontal ridges or dents in one or more of your fingernails or toenails. They are a sign that an illness, injury or skin condition interrupted your nail growth. Thicker Beau's lines may be a sign that an illness or trauma lasted a long time. Beau's lines on all of your nails can mean that an illness or stress caused them. Multiple Beau's lines on each nail may mean that an illness or trauma happened more than once. Treating the underlying cause will allow new, smooth nails to grow again.
Your healthcare provider or dermatologist may diagnose Beau's lines by examining your nails and taking a health history. The thickness and number of Beau's lines also provide clues about the cause. A single Beau's line on one nail may indicate an injury that affected only one finger or toe.
Ridges in your nails are usually harmless but can mean different things. Vertical ridges are often a sign of ageing, while horizontal ridges can point to issues like malnutrition, serious nail injury, or Beau's lines. Ridges in your fingernails or toenails can be a sign of a current or past illness. They may also happen if you have a nutrient deficiency.
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Frequently asked questions
It could be a sign of ageing, malnutrition, serious nail injury, or Beau's lines. Beau's lines are horizontal ridges that can be caused by an illness, injury, or skin condition that interrupted your nail growth.
Beau's lines are horizontal ridges or dents in one or more of your fingernails or toenails. They are usually caused by an illness, injury, or skin condition that interrupted your nail growth.
Beau's lines are diagnosed by a healthcare provider or dermatologist who will examine your nails and take a health history. The thickness and number of lines can also provide clues about the cause.
There is no treatment for Beau's lines. However, treating the underlying cause will allow new, smooth nails to grow again.
Yes, ridges in your nails can also be a sign of vitamin deficiencies or diabetes.



































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