Liam Carter
Changes in fingernail colour can indicate a lot about a person's health. Healthy fingernails are typically flesh-coloured or have a pinkish hue with white tips and a subtle shine. However, deviations from this colour, such as blue, black, white, yellow, or green discolouration, may signal underlying health issues. For example, bluish nails may indicate poor circulation or respiratory issues, while pale or white nails can be a sign of anaemia or liver disease. Therefore, it is important to be aware of any changes in fingernail colour and consult a healthcare professional if abnormalities are noticed, as this can aid in the early detection and treatment of potential health conditions.
| Characteristics | Values |
|---|---|
| Healthy colour | Pinkish hue with white tips |
| Colour change causes | Fungal infections, thyroid disease, nutritional deficiencies, injuries, respiratory disorders, infections, and other underlying health conditions |
| Blue nails | Poor circulation, respiratory issues, Raynaud's disease, septicemia, lung or breathing troubles, high percentage of abnormal form of haemoglobin in the blood, HIV infection, or a side effect of certain medications |
| Pale or white nails | Anaemia, liver disease, hepatitis |
| Yellow nails | Fungal infection, psoriasis, lung diseases (e.g. emphysema, chronic bronchitis), fluid in lungs, sinusitis, thyroid problems, lymph accumulation, rheumatoid arthritis, or genetic factors |
| Greenish-black nails | Bacterial infection |
| Blackish nails | Anemia, bacterial infection, chronic kidney disease, adrenal problems, B12 deficiency, liver disease, silver deposits, certain forms of cancer or melanoma, injury, or trauma |
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What You'll Learn
Fingernail colours and their health implications
Healthy fingernails are typically flesh-coloured or exhibit a pinkish hue, with subtle shine and a smooth, round surface. They may also vary from light mauve (purple) in darker skin tones to pale pink in lighter skin. However, deviations in colour, such as blue, black, white, yellow, or green discolourations, may signal underlying health issues.
Blue Nails
Bluish nails can indicate poor circulation or respiratory issues. This may be a sign of Raynaud's disease, where the fingers and toes shrink, turn blue, and may become numb or painful when exposed to cold. It may also indicate argyria (silver poisoning), hepatolenticular degeneration (Wilson's disease), septicemia (blood poisoning), lung or breathing problems (including emphysema, chronic obstructive pulmonary disease, chronic bronchitis, or asthma), a high percentage of abnormal forms of haemoglobin in the blood, occupational hazards, HIV infection, or side effects from certain medications.
Black Nails
Blackish nails can suggest signs of anemia, bacterial infection, chronic kidney disease, adrenal problems, B12 deficiency, liver disease, silver deposits, certain forms of cancer or melanoma, or injury/trauma.
White Nails
White nails, also known as leukonychia, can be caused by trauma, anemia, dietary deficiencies, heart or kidney disease, or poisoning. If the nails are mostly white with darker rims, this may indicate liver problems such as hepatitis. Not everyone with white nails has hepatitis, and nail changes are rarely the first sign of a serious illness.
Yellow Nails
Yellow nails can be a sign of a fungal infection or psoriasis. Smoking or wearing red nail polish without a base coat can also turn nails yellow.
Green Nails
Greenish-black discolouration can be a sign of a bacterial infection.
In general, changes in nail colour, texture, or shape can indicate underlying health issues. If you notice any concerning changes in your nails, it is recommended to consult a dermatologist or healthcare provider to address potential conditions effectively.
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What your fingernail colour says about your personality
While the colour of your natural nails can give an insight into your health, the nail polish you choose can reveal something about your personality.
Red Nails
Red nails are an indicator of someone who is daring and passionate but, above all, confident. The various shades of red are worlds apart, with brighter reds being retro and summery, making it the perfect choice for warmer months.
Yellow Nails
Yellow nails are a cheery colour that exudes warmth and a friendly disposition. This colour is indicative of a light-hearted person and is the perfect addition to a bohemian style. If you want something a little more subdued, opt for a pastel yellow.
Purple Nails
Darker shades of purple are unique and artistic, reflecting those qualities in the person wearing them. Lighter shades, like lilac, are playful and timeless and are often similar to a light pink, which is a true summer classic.
Green Nails
Green is an earthy tone that can exude a person's personality. It is sometimes a fashion and political statement at the same time. Darker shades like emerald and lighter shades like lime have become prevalent in the fashion world.
Black Nails
Black nails are a bold choice and may indicate a glamorous, confident person.
White Nails
White nails are a classic choice and can indicate a playful personality.
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The average growth rate of fingernails
The growth rate of fingernails can also be influenced by other factors such as nail-biting, trauma to the nail, and frequent nail clipping. Onychophagia, or chronic nail-biting, has been associated with a faster nail growth rate. This may be because biting causes trauma to the nail, stimulating circulation in the nail bed. Similarly, trauma to the nail, such as catching your nail on something or hitting it with a hammer, may increase nail growth. This is because the body sends more blood and nutrients to the area to help repair it, and this influx of nutrients may speed up nail growth. Frequent nail clipping has also been linked to faster nail growth, although it does not carry the same risks as nail biting.
As people age, the rate of nail growth decreases. According to the NCBI, starting at age 25, the rate of growth decreases by approximately 0.5% per year. A 2007 study found that between the ages of 23 and 67, the rate of nail growth decreased from 0.123 mm per day to 0.095 mm per day. This change in speed may be due to a slowdown in blood circulation as people age.
The colour of fingernails can also provide clues about a person's health. Healthy fingernails are typically flesh-coloured with white tips and a subtle shine to the cuticles. Changes in nail colour, such as yellow, green, blue, black, or white discolouration, may indicate underlying health issues such as nutritional deficiencies, infections, or systemic diseases. For example, bluish nails may indicate poor circulation or respiratory issues, while pale or white nails may be a sign of anaemia or liver disease. Therefore, it is important to pay attention to any deviations in the colour, shape, or texture of your fingernails as they can provide valuable insights into your overall health.
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The science behind abnormal fingernail colours
The colour of your fingernails can reveal a lot about your health. Nails are made of a protective protein called keratin, and changes in their colour, shape, or texture can indicate an underlying health condition.
Healthy fingernails typically exhibit a pinkish hue, while colour deviations such as blue, black, white, yellow, or green discolourations may signal underlying health issues. For example, bluish nails may indicate poor circulation or respiratory issues, while white nails can be a sign of anaemia or liver disease. Yellow nails often indicate a fungal infection or psoriasis, and black or greenish nails can signify a bacterial infection. In some cases, nail discolouration may be caused by nutritional deficiencies or certain medications.
Nail abnormalities can also be indicative of more serious conditions. For instance, dark streaks on the nails could be a sign of melanoma, the most severe form of skin cancer. Additionally, pitted nails, characterised by small dents, can indicate a systemic disease, while spoon-shaped nails may be a sign of iron deficiency. Curved nails, known as "clubbing," can result from low oxygen levels in the blood and be indicative of lung disease.
While nail colour changes can provide valuable insights into potential health issues, it is important to remember that these changes are rarely the first sign of a serious illness. Most individuals will exhibit other symptoms before nail abnormalities become apparent. Nonetheless, if you notice any unusual changes in your nail colour, it is recommended to consult a healthcare professional for proper diagnosis and treatment.
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The importance of fingernail colour, texture, and shape
The colour, texture, and shape of one's fingernails can be indicative of their overall health and well-being. While some changes in these aspects may be harmless, others may signal an underlying health issue. Thus, it is important to pay attention to any deviations in the colour, texture, and shape of one's fingernails.
Colour: Healthy fingernails typically exhibit a pinkish hue with a subtle shine and white tips. Deviations from this colour, such as blue, black, white, yellow, or green discolourations, may indicate underlying health issues. For example, bluish nails can suggest poor circulation or respiratory issues, while pale or white nails can be a sign of anaemia or liver disease. Yellow nails can indicate a fungal infection, and green or black discolouration can signal a bacterial infection. In some cases, discoloured nails may also be a result of lifestyle factors, such as smoking or wearing nail polish without a base coat.
Texture: Healthy fingernails are generally smooth, without spots or discolouration. Changes in texture, such as ridges, pitting, brittleness, or thickening, can indicate various health issues. For instance, pitted or dimpled nails can be a sign of psoriasis, while soft, thin nails that break or tear easily may be due to exposure to chemicals or nutritional imbalances. In some cases, changes in nail texture may also be a normal part of ageing or a side effect of medication.
Shape: Abnormalities in nail shape can also indicate potential health issues. For example, curved nails, known as "clubbing," may suggest cardiovascular, pulmonary, or gastrointestinal problems. Spoon-shaped nails, which are thin and dip down in the middle, can indicate iron deficiency or hemochromatosis. Nails that lift up and are no longer completely attached can be a sign of onycholysis, while pitted or ridged nails may be a result of nail-picking or cuticle-pushing habits.
While most changes in nail colour, texture, or shape are usually harmless, it is important to consult a healthcare professional if you notice any persistent or concerning deviations. These changes can sometimes be early indicators of underlying health conditions, and prompt consultation can aid in early detection and treatment.
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Frequently asked questions
White nails can indicate anaemia or liver disease. However, not everyone with white nails has hepatitis.
Bluish nails can indicate poor circulation or respiratory issues. They may also suggest that the body isn't getting enough oxygen.
Yellow nails may indicate a fungal infection or psoriasis.
Healthy nails are typically pink with a white half-moon shape (called the lunula) at the base. They should also have a subtle shine, and the cuticles should look healthy.
