Liam Carter
Indentations on the thumb nail can be caused by a number of factors, including dermatologic conditions, autoimmune diseases, and nutritional deficiencies. They can also be triggered by illnesses and infections such as COVID-19, strep throat, and pneumonia. Indentations on the thumb nail are often referred to as Beau's lines, which were named after the French physician Joseph Honoré Simon Beau who first discovered the condition in 1846. Beau's lines can appear as deep grooved lines that run horizontally across the nail plate, affecting one or more nails.
| Characteristics | Values |
|---|---|
| Name | Beau's lines |
| Appearance | Deep grooved lines that run horizontally across the nail plate |
| Colour | May have a slight yellow discolouration |
| Causes | Any event that disrupts nail growth, including illnesses and infections |
| Examples of illnesses and infections | COVID-19, strep throat, pneumonia |
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Beau's lines
Dents, ridges, and holes in the nails can be caused by dermatologic conditions and autoimmune diseases that cause skin cell overgrowth and buildup. Endocrine disorders, nutritional deficiencies, and chronic iron deficiency are also often associated with nail denting. Spoon nails, for example, are considered a manifestation of something deeper in the body. They are characterised by a flattened nail followed by an indentation deep enough to hold a drop of water in the nail bed. The central portion of the nail then becomes depressed as it grows, while the rest of the nail appears elevated.
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Spoon nails
Indentations on the thumbnail can be a sign of spoon nails. Spoon nails form gradually, with the first sign being a flattened nail followed by an indentation deep enough to hold a drop of water in the nail bed. The central portion of the nail then becomes depressed as it grows, and the rest of the nail appears elevated. The nails may also appear brittle and thin and feel soft to the touch. Spoon nails are considered to be a manifestation of something deeper in the body. Chronic iron deficiency is one of the main causes, as well as other conditions that can lead to malnutrition, such as coeliac disease. Endocrine disorders, autoimmune conditions, and nutritional deficiencies are also often causes.
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Ridges in nails
Ridges, indentations, and holes in the nails can also be caused by an issue with how the layers in the superficial nail plate develop. Spoon nails, for example, are caused by chronic iron deficiency, malnutrition, endocrine disorders, autoimmune conditions, and nutritional deficiencies.
According to 2022 research, ridges are usually due to ageing, but they can also be a sign of improper nail care, nail trauma, vitamin deficiencies, or a more pressing medical condition. Vitamins that can contribute to nail health include zinc and vitamins A, C, and D. Biotin is also highly recommended to aid in nail health, but more research is needed to understand the full extent of its benefits.
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Vertical ridges
Beau's lines were named for French physician Joseph Honoré Simon Beau, who first discovered the condition in 1846. They can appear as moat-like depressions or dents on one or more nails and can affect the fingernails or toenails. They may also have a slight yellow discolouration similar to a fungal infection.
While vertical ridges are usually harmless, it is important to maintain proper nail care and address any nutritional deficiencies that may be causing them. If you are concerned about the appearance of ridges on your nails, it is best to consult a healthcare professional.
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Horizontal ridges
Beau's lines are named after French physician Joseph Honoré Simon Beau, who first described the condition in 1846. They are characterised by deep grooved lines that run horizontally across the nail plate, sometimes with a slight yellow discolouration similar to a fungal infection.
While horizontal ridges on the nail are usually harmless, they can sometimes indicate an underlying medical condition. If you are concerned about the appearance of horizontal ridges on your nails, it is recommended that you consult a healthcare professional for further advice and guidance.
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Frequently asked questions
Indentation on the thumbnail can be a sign of a dermatological condition, an autoimmune disease, or an issue with how the layers in the superficial nail plate develop.
Indentations on the thumbnail can be shallow or deep and found on various parts of the nail in different directions. They can also be referred to as Beau's lines, which are deep grooved lines that run horizontally across the nail plate.
Causes of indentation on the thumbnail include chronic iron deficiency, malnutrition, endocrine disorders, autoimmune conditions, and nutritional deficiencies.
This could be a sign of spoon nails, which are considered to be a manifestation of something deeper in the body, such as chronic iron deficiency, malnutrition, or an endocrine disorder.
