Caleb Foster
Your fingernails can reveal a lot about your health. Changes in nail colour, texture, and shape can indicate underlying health issues. Hard nails that are strong and don't break easily are a sign of good health. On the other hand, soft nails that break easily can be a sign of iron deficiency or hypothyroidism. Nail discolouration can be caused by various factors, including smoking, nail fungus, and respiratory conditions. Vertical ridges on nails are usually harmless, but horizontal ridges, also known as Beau's lines, may indicate kidney disease or other underlying conditions. White spots on nails can be a sign of zinc or calcium deficiency, while yellow nails are often associated with nail fungus or a reaction to nail polish. Paying attention to any sudden changes in your fingernails is important, and consulting a doctor is recommended if you have concerns about your nail health.
| Characteristics | Values |
|---|---|
| Hard Nails | Good health |
| White Nails | Trauma, anemia, dietary deficiencies, heart or <co: 2,4,7,15>kidney disease, poisoning, hepatitis |
| Yellow Nails | Smoking, nail fungus, painting nails too often, respiratory condition, chronic bronchitis, fungal infection |
| Black/Dark Red Lines | Trauma to the nail, psoriasis, endocarditis, nail melanoma |
| White Spots | Zinc deficiency, nail fungus, trauma to the nail |
| Peeling Nails | Deficiency in mineral absorption, low amount of acid in the stomach |
| Dry Cuticles | Lack of hydration |
| Nail Ridges | Vertical ridges are harmless, horizontal ridges (Beau's lines) may indicate kidney disease or other underlying conditions |
| Clubbing | Low oxygen levels in the blood, lung disease, heart disease, liver problems, inflammatory bowel disease |
| Spoon Nails | Iron deficiency anemia |
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What You'll Learn
Hard nails are a sign of good health
Healthy nails are typically smooth, with no spots or discolouration, and are generally pink in colour. Hard, healthy nails can be a sign of good overall health, and may indicate that you do not have any nutritional deficiencies or underlying health conditions.
Nail abnormalities are rarely the first sign of a serious illness, and are often harmless. However, keeping an eye on your nail health can help you catch problems early. Nails can reveal clues about your health, and certain changes in colour, texture or shape can signal health problems. For example, horizontal ridges, or Beau's lines, indicate a pause in nail growth, which could be due to your body fighting off an illness. Vertical ridges, on the other hand, are usually a normal sign of ageing.
Yellow nails are common and are usually caused by an infection, or a reaction to a product such as nail polish. In rare cases, yellow nails can be a sign of a respiratory condition, or even lung disease, heart disease, liver problems or skin cancer. White spots on nails are generally harmless and are usually the result of minor trauma, but can sometimes indicate liver or kidney failure. Pale nails can also indicate illnesses such as anaemia, congestive heart failure or liver disease.
If you notice any changes in your nails that concern you, it is always best to speak to a healthcare professional.
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Nail colour changes
Fingernails can reveal a lot about a person's health. Healthy nails are typically smooth and have consistent colouring. However, if you notice any nail discolouration, it could be indicative of an underlying health condition. Here are some possible causes of nail colour changes:
White Nails
White nails, known as leukonychia, can be caused by several factors, including trauma, anaemia, dietary deficiencies, heart or
Yellow Nails
Yellow nails are relatively common and are usually caused by a fungal infection. Yellowing can also be a result of smoking, using red nail polish, or underlying health issues such as rheumatoid arthritis, lung disease, chronic bronchitis, or respiratory conditions. In rare cases, yellow nails could indicate a more serious issue, including skin cancer or liver problems.
Greenish-Black Nails
A bacterial nail infection can cause the nail to turn greenish-black. This condition, known as paronychia, requires medical treatment to clear the infection and alleviate pain and tenderness.
Dark Streaks
Dark streaks on the nails, known as splinter haemorrhages, can be caused by trauma to the nail, such as accidentally slamming a finger in a door. However, in rare cases, they could indicate underlying issues such as psoriasis, endocarditis, or nail melanoma, the most serious type of skin cancer.
Blue or Red Nails
Unexplained changes to blue or red nails can be a warning sign of underlying diseases, infections, or even poisoning. Redness and swelling around the nail could indicate an infection, which is easier to treat if diagnosed early.
While some nail colour changes may be harmless, it is always a good idea to consult a dermatologist or healthcare professional if you notice any persistent or unusual changes to your nails, as they can be an important indicator of your overall health.
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Nail shape changes
Vertical ridges on the nails, running from the tip to the cuticle, are generally not a cause for concern and are a common occurrence later in life. Horizontal ridges, or Beau's lines, can indicate kidney disease or other underlying conditions. They can also appear temporarily after a high fever, serious injury, severe illness, or infection, and will grow out without causing problems.
Peeling nails can indicate a deficiency in mineral absorption, which may be caused by insufficient stomach acid for proper digestion. White spots on the nails can be a sign of zinc or calcium deficiency, or small areas of nail fungus. They can also be caused by minor trauma to the nail, such as bumping your finger.
Yellow nails are often caused by smoking, nail fungus, or frequently painting nails without a base coat. They can also be a sign of a respiratory condition, such as chronic bronchitis, or, in rare cases, skin cancer.
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Nail texture changes
Fingernails can reveal a lot about a person's health. Changes in nail texture can indicate mineral absorption deficiency, low stomach acid, dietary deficiencies, or even more serious conditions.
Peeling Nails
Peeling nails can indicate a deficiency in mineral absorption. This can be caused by insufficient chewing of food or low stomach acid, which affects the digestion of food.
Rough, Brittle Nails
Officially called onychoschizia, rough, brittle nails that crack easily are usually caused by repeated wetting and drying of the fingernails. They can also be a sign of hypothyroidism or iron deficiency.
Ridges
Vertical ridges are generally harmless and tend to appear later in life. Horizontal ridges, also called Beau's lines, can be a sign of kidney disease or another underlying condition.
Nail Discoloration
Yellow nails are usually caused by a fungal infection or a reaction to nail products. In rare cases, yellow nails can be a sign of a more serious issue, such as skin cancer, chronic bronchitis, or liver problems. White nails, or leukonychia, can be caused by trauma, anemia, dietary deficiencies, heart or kidney disease, or poisoning.
Indentations
Nail indentations, also known as nicks or pits, can be a symptom of psoriasis.
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Nail conditions
Fingernails can provide clues about a person's overall health and well-being. Healthy nails are typically smooth, uniform in colour, and free from any significant ridges or spots. Deviations from these standards may indicate underlying health issues that require attention. Here are some common nail conditions and what they could mean:
Nail Discolouration:
Nail discolouration, such as yellowing or whitening of the nails, can be indicative of various conditions. Yellow nails are commonly associated with nail fungus, which can be treated with anti-fungal medication. However, in rare cases, yellow nails could be a sign of respiratory issues, chronic bronchitis, or even skin cancer. White nails, known as leukonychia, can be a result of trauma, anaemia, dietary deficiencies, heart or kidney disease, or poisoning.
Ridges and Lines:
Vertical ridges on nails are generally harmless and tend to appear as people age. They run from the tip of the fingernail to the cuticle and do not require treatment. On the other hand, horizontal ridges, also known as Beau's lines, may indicate kidney disease or other underlying conditions. These lines show where nail growth has temporarily stopped due to stress, injury, or illness.
Splinter Hemorrhage:
Black lines on the nails, which can also appear brown or dark red, are called splinter hemorrhages. They are often the result of trauma to the nail, such as slamming a door on your finger. However, in rare cases, they could indicate underlying issues such as psoriasis, endocarditis, or nail melanoma.
Peeling Nails:
Peeling nails can indicate a deficiency in mineral absorption or a lack of stomach acid, leading to improper digestion.
Spoon Nails (Koilonychia):
This condition is characterised by nails that grow in a concave shape, resembling a ski jump. Spoon nails are often associated with iron deficiency anaemia.
It is important to note that while your nails can provide insights into your health, many abnormalities are harmless. If you are concerned about any changes in your nails, it is always best to consult a doctor or dermatologist for proper diagnosis and treatment.
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Frequently asked questions
Hard fingernails are usually a sign of good health.
Soft fingernails break easily or bend before snapping. They could be caused by something as minuscule as not chewing your food enough, which can lead to a deficiency in mineral absorption.
Brittle nails, also known as onychoschizia, are usually caused by repeated wetting and drying of the fingernails. They can also be a sign of hypothyroidism or iron deficiency.
White spots on nails, also known as leukonychia, can be caused by a zinc or calcium deficiency, nail fungus, or trauma to the nail.
Yellow nails can be caused by smoking, nail fungus, or painting your nails too often without using a base coat. In rare cases, yellow nails can be a sign of a larger issue, such as skin cancer, chronic bronchitis, or liver problems.
