Liam Carter
Your nails can reveal a lot about your overall health. Changes in nail colour, shape, or texture can indicate underlying health conditions. For example, white nails could indicate trauma, anemia, dietary deficiencies, heart or kidney disease, or even poisoning. Yellow nails are often a sign of a fungal infection, while bluish nails can indicate a lack of oxygen in the body and potentially point to a lung or heart problem. Nail abnormalities are rarely the first sign of an issue, but they can provide valuable clues, and persistent concerns should be addressed by a healthcare professional.
| Characteristics | Values |
|---|---|
| White nails | Trauma, anemia, dietary deficiencies, heart or kidney disease, poisoning, liver problems (e.g. hepatitis), or leukonychia |
| Yellow nails | Ageing, smoking, nail lacquers, acrylic nails, fungal infection, yellow nail syndrome, lung issues, limb swelling |
| Bluish nails | Lack of oxygen in the body, lung problems (e.g. emphysema), heart problems |
| Rippled or pitted nails | Psoriasis, inflammatory arthritis |
| Dry, brittle nails | Thyroid disease, hypothyroidism, iron deficiency, repeated wetting and drying of fingernails |
| Yellow-reddish discolouring | Psoriasis, salmon patch, oil drop |
| Horizontal lines | Reduced nail matrix activity, illness, side-effect of medication or surgery |
| Vertical lines | Ageing, alopecia areata, onychorrhexis |
| Thick, bumpy, or pitted nails | Nutritional deficiencies, gastrointestinal problems, iron problems, infections, diabetes, peripheral artery disease, zinc deficiency, medications, high fever, trauma, water or chemical exposure, age |
| Nail biting | Anxiety, obsessive-compulsive disorder |
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What You'll Learn
- White nails could indicate trauma, anemia, dietary deficiencies, or heart disease
- Bluish nails can mean the body isn't getting enough oxygen, possibly indicating a lung problem
- Rippled or pitted nails may be a sign of psoriasis or inflammatory arthritis
- Dry, brittle nails can be linked to thyroid disease or iron deficiency
- Yellow nails are often a sign of a fungal infection
White nails could indicate trauma, anemia, dietary deficiencies, or heart disease
Your nails can be a window to your overall health, and subtle changes in their colour or texture may indicate an underlying disease. White nails, or leukonychia, are the most common type of nail dyschromia and can be inherited or acquired. While many nail abnormalities are harmless, white nails can sometimes be a sign of trauma, anemia, dietary deficiencies, or heart disease.
White nails can be the result of trauma to the nail or matrix, causing damage and keratin disruption with trapped air within the nail plate, resulting in reflection and a lack of transparency. This can lead to the appearance of white spots or lines on the nails, which are generally harmless. However, if the lines are horizontal and appear on multiple nails, it may indicate a more severe illness or injury, reduced nail matrix activity, or a side effect of certain medications or surgeries.
White nails can also be a sign of anemia, a condition where the body does not have enough healthy red blood cells. Anemia can cause a decrease in the oxygen-carrying capacity of the blood, leading to symptoms such as fatigue, weakness, and pale skin. Dietary deficiencies, such as a lack of certain vitamins and minerals, can also lead to nail discolouration. Dr Sara Norris, a naturopathic doctor, explains that "our bodies are smart, so when we're low in vitamins and minerals, our nails and hair will show it".
Additionally, white nails can be a marker of underlying heart disease. Problems in the heart can sometimes show up in your nails, and nail discolouration can be an early warning sign. While white nails can have various causes, it is important to monitor any changes in your nail's appearance and consult a healthcare professional if you have any concerns.
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Bluish nails can mean the body isn't getting enough oxygen, possibly indicating a lung problem
The appearance of our nails can reveal a lot about our overall health. Bluish nails, known as cyanosis, occur when our blood doesn't have enough oxygen. This could indicate a lung problem, such as emphysema, pulmonary embolism, pneumonia, asthma, or chronic obstructive pulmonary disease (COPD). It can also be a sign of a heart condition or an issue with the blood cells or vessels.
Cyanosis can be caused by exposure to cold temperatures, which cause the blood vessels to constrict, making it difficult for oxygen-rich blood to reach the nails. In such cases, warming up the hands or massaging them may help restore normal nail colour. However, if the blue discolouration persists, it may indicate an underlying condition or structural difference that is interfering with the body's ability to deliver oxygen-rich blood.
It is important to seek medical attention if you notice bluish nails, especially if accompanied by other symptoms such as difficulty breathing, numbness or tingling in the arms and legs, or extreme fatigue. A healthcare provider can perform tests, such as an arterial blood gas analysis or a chest X-ray, to determine the underlying cause and provide appropriate treatment.
While nail discolouration can be a sign of a health issue, it is important to note that it can also be caused by harmless factors, such as injury or overexposure to moisture. Additionally, nail abnormalities can result from lifestyle factors, such as manicures or smoking. If you have any concerns about the appearance of your nails, it is always best to consult a healthcare professional.
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Rippled or pitted nails may be a sign of psoriasis or inflammatory arthritis
The appearance of your nails can indicate a lot about your overall health. Problems in the liver, lungs, and heart can show up in your nails. For example, nails with a bluish tint can indicate a lack of oxygen in the body, which could be a sign of a lung problem, such as emphysema, or a heart issue.
The length of the pits can indicate the time since the onset of the disease, while the length of the healthy nail between the pits can indicate the time free from psoriasis. Pitting may also be caused by other diseases, such as eczema, alopecia areata, and lichen planus. Psoriatic arthritis can also cause nail discolouration, with white, yellow, or brown colours and reddish marks, known as splinter haemorrhages, being common.
If you are experiencing nail issues, it is important to consult a healthcare professional, as they can provide guidance and treatment options.
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Dry, brittle nails can be linked to thyroid disease or iron deficiency
Dry, brittle nails that frequently crack or split have been linked to thyroid disease. Onychoschizia, or brittle nails, are usually caused by repeated wetting and drying of the fingernails. However, in some cases, brittle nails might also be a sign of hypothyroidism or hyperthyroidism. A 2022 study found that those with autoimmune thyroid disorders, such as Hashimoto's or Graves' disease, had a higher percentage of nail brittleness than those with non-autoimmune thyroid conditions. Onycholysis, or Plummer's nail, is a condition where the nail plate pulls away from the skin of the nail bed and is more common in people with hypothyroidism. Additionally, those with hypothyroidism may experience slow-growing, thin nails.
Nail changes associated with thyroid disease are important for early diagnosis, and a dermatologist may be the first doctor to notice these signs. Thyroid disease can be serious if left untreated for years, potentially leading to a dangerously slow or fast heartbeat, injuries that refuse to heal, or persistent pain. Therefore, it is crucial to consult a healthcare professional if you notice any changes in your nails that could indicate thyroid dysfunction.
Iron deficiency is another potential cause of dry, brittle nails. Iron deficiency can lead to a condition known as koilonychia, which is characterised by thin, brittle nails that frequently crack or split. While iron deficiency can cause nail changes, it is important to note that nail issues are often due to injury or overexposure to moisture rather than systemic disease.
Biotin supplements, which contain high doses of a water-soluble B vitamin, can help prevent nail splitting and breakage. However, it is important to consult a healthcare provider before adding new supplements to your regimen, as biotin can interfere with thyroid test results. Additionally, applying lotions containing alpha hydroxy acids or lanolin and wearing gloves during water-intensive tasks can help prevent brittle nails caused by frequent wetting and drying.
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Yellow nails are often a sign of a fungal infection
Yellow nails are often an indication of a fungal infection. This condition, also known as onychomycosis or tinea unguium, occurs when a fungus that is typically present in the fingernails or toenails overgrows. While nail discolouration can be caused by smoking or nail lacquers, it is important to be vigilant about any changes in your nail colour, as it could be a sign of an underlying fungal infection.
Fungal nail infections can cause nails to become brittle, discoloured, or unusually thick. The affected nail may thicken and become difficult to trim. It may start to curl up or down and loosen from the nail bed. The nail could become brittle and crumble when touched. In some cases, the nail may become misshapen, and the surrounding skin may swell and become painful.
The fungal infection can spread from the edges of the nail to its centre, and the nail may come apart from the nail bed. Initially, you may notice a white or yellow spot under your nail, which gradually spreads and can turn the entire nail yellow. The nail may also turn white, green, or black.
Distal subungual infections are the most common type of fungal nail infection, which can develop in both fingernails and toenails. When infected, the outer edge of the nail appears jagged, with white and/or yellow streaks across it. Proximal subungual infections are less common but can also affect both fingernails and toenails. Candida yeasts cause this type of infection, which often occurs in people who frequently soak their hands in water.
If you suspect a fungal nail infection, it is important to consult a doctor. They can confirm the diagnosis by examining a scraping of the nail under a microscope for signs of fungus. Treatment options include prescription-strength oral antifungal medications, topical creams, or, in serious cases, removal of the nail to allow a healthy new one to grow.
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Frequently asked questions
Healthy nails are typically smooth and free of spots or discolouration. They are also convex in shape.
White spots on your nails, known as leukonychia, are generally harmless and are the result of minor trauma. However, they can sometimes be a sign of liver or kidney failure.
Yellow nails can be a sign of a fungal infection. They can also be caused by smoking, or in rare cases, yellow nail syndrome, which is associated with respiratory issues and limb swelling.
Spoon nails are concave in shape and can be a sign of iron deficiency anaemia. They can also be caused by skin diseases that cause nail thinning, or inflammatory conditions like psoriasis.
