
Fingernails can fall off due to various reasons, including injuries, fungal infections, skin conditions, medication, and thyroid issues. When a fingernail falls off, it is important to protect the sensitive skin underneath, known as the nail bed, to ensure proper healing and nail regrowth. This can be done by covering the area with a bandage or using a local numbing treatment. In some cases, medical attention may be required, especially if there is bleeding or signs of infection. Fingernails typically take around 4 to 6 months to grow back fully, and during this time, it is crucial to take the necessary precautions to prevent further damage and promote healthy nail regrowth.
| Characteristics | Values |
|---|---|
| Growth rate | 3.5 mm (0.14 in) a month for fingernails, 1.6 mm (0.063 in) a month for toenails |
| Regrowth time | 3-6 months for fingernails, 12-18 months for toenails |
| Composition | Made of a tough, rigid protein called alpha-keratin, which includes 7-12% water |
| Structure | Consist of the nail plate, the nail matrix, and the nail bed; framed by the lateral nail folds |
| Function | Provide protection, used as tools (e.g. for scratching), and are part of the sense of touch |
| Health indicators | Can indicate overall health, including blood circulation, skin problems, lung disease, anemia, and other conditions |
| Grooming | Should be trimmed straight across and slightly rounded at the top; moisturizing nails and cuticles is recommended |
| Record holders | Longest female nails: 8.65 m (28 ft 4.5 in); Longest male nails: Shridhar Chillal with 615.32 cm of nails on his left hand |
| Abnormalities | Ingrown nail, nail injury, nail deformity, hangnail, infections |
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What You'll Learn

Fingernail growth rate
The average human fingernail grows at a rate of approximately 3.5 mm per month, while toenails grow about half as fast, at around 1.6 mm per month. It takes between three to six months for fingernails to regrow completely, and toenails require twelve to eighteen months. The rate of fingernail growth is influenced by several factors, including age, sex, season, exercise level, diet, and hereditary factors. For example, the nails on the dominant hand tend to grow faster, and nails also grow more rapidly during the day and in the summer.
The growth rate of fingernails can also be influenced by overall health and certain health conditions. For instance, nail growth is slower in individuals who are immunocompromised, paralyzed, malnourished, or have an infection. Additionally, the health of the nails themselves plays a role in their growth rate. Practicing good nail hygiene, such as keeping nails clean and dry, trimming them regularly, and avoiding biting them, can promote nail health and support faster growth. Eating a nutritious and well-balanced diet can also positively impact nail growth.
Hormone levels are another factor that affects fingernail growth rates. Puberty, for example, is a time when nail growth is typically rapid due to fluctuating hormone levels. Pregnancy can also influence nail growth rates, causing them to increase during pregnancy and decrease during lactation. As individuals age, their hormone levels tend to balance out, leading to a decline in nail growth rates over time.
The specific finger also impacts the growth rate of fingernails. Studies have found that the little finger's nail grows slower than the other fingernails. Additionally, the nails on longer fingers tend to grow faster. The shape of the fingertip bone determines the shape of the nail, and the width and thickness of the nail plate are influenced by the size, length, and thickness of the matrix.
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Fingernail composition
Fingernails are made of a tough, rigid protein called alpha-keratin, a polymer also found in the claws, hooves, and horns of vertebrates. The nail consists of the nail plate, the nail matrix, and the nail bed below it, along with the grooves surrounding it. The nail plate, also known as the nail body, is the hard, outer part of the nail that is visible. It is made of translucent keratin protein and several layers of dead, compacted cells that give the nail its strength and flexibility. The nail matrix, or germinal matrix, is the active tissue that generates cells. These cells harden as they move outward from the nail root to the nail plate, determining the nail's width and thickness. The nail bed is the part beneath the nail that contains nerves, lymph, and blood vessels. It is strongly attached to the nail plate and forms a seal that protects the nail bed from damage.
The composition of fingernails includes several key components that contribute to their structure and function. One of the main components is cystine, a sulfur-containing amino acid that accounts for approximately 10.5% of the nail's composition. Cystine plays a crucial role in holding the nail protein structure together and providing the necessary structural robustness. Additionally, fingernails contain a significant amount of water, ranging from 7% to 12%. This water content contributes to the nail's flexibility, with higher water levels resulting in increased flexibility.
Another important component of fingernails is lipid, which constitutes about 1% of the nail's composition. Lipid is believed to reside between the corneocyte cells, and its depletion can lead to nail brittleness. Fingernails also contain a variety of minerals, including calcium, zinc, and magnesium. While their specific roles are not yet fully understood, these minerals are thought to contribute to the overall structure and health of the nails. Additionally, fingernails are susceptible to various infections, primarily caused by dermatophytes, yeasts, and molds. These infections can affect the nail's appearance and cause pain, discomfort, and a loss of dexterity.
The health of fingernails can provide valuable insights into an individual's overall health and well-being. Healthcare providers often examine the fingernail beds as an indicator of distal tissue perfusion in individuals who may be dehydrated or in shock. Changes in nail colour, such as bluish or purple fingernail beds, can signal oxygen deprivation or peripheral cyanosis. Additionally, deep horizontal ridges known as "Beau's lines" may indicate underlying health conditions or natural aging. Proper nail care, including regular trimming and filing, is essential to maintain nail health and prevent issues such as roughness, tangling, and infections.
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Fingernail maintenance
Avoid Unhealthy Habits: Refrain from biting your fingernails or cuticles. While it may be a nervous habit or seem like a quick way to trim them, it can cause damage to your nails and the skin around them, increasing the risk of infection. Similarly, avoid using your nails as tools for tasks like opening cans or prying things open. This can lead to chipping, splitting, or lifting of the nail bed.
Protect from Water Damage: Prolonged exposure to water can weaken your nails, making them prone to splitting, peeling, or breaking. To prevent this, wear gloves when washing dishes or performing household cleaning tasks that involve water. After washing your hands, remember to moisturize to keep your nails and the surrounding skin hydrated.
Trim and Shape Regularly: Trim your fingernails regularly to maintain a neat appearance and prevent them from becoming too long and susceptible to breakage. Use a suitable nail clipper and file to achieve your desired length and shape. Always file in one direction to prevent nail weakening and potential tearing.
Nail Care Products: Consider using nail care products to enhance and protect your nails. Clear nail hardeners can be applied to provide extra strength and prevent breakage. If you enjoy painting your nails, choose nail polishes that include nail-fortifying ingredients. Remember to always use a base coat before applying coloured polish to prevent staining, and finish with a top coat for added protection and shine.
Maintain a Healthy Diet: The health of your nails is also influenced by your diet. Ensure you're consuming a well-balanced diet that includes essential nutrients such as biotin (found in eggs, nuts, and seeds), vitamin D, and protein. These nutrients promote nail strength and growth.
By following these fingernail maintenance tips, you can achieve and maintain healthy, strong, and attractive fingernails.
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Fingernail health indicators
Fingernails are composed of a tough, rigid protein called alpha-keratin, which is also found in claws, hooves, and horns of vertebrates. They are protective plates found at the tip of the digits of primates, corresponding to the claws in other tetrapod animals.
Fingernails are often overlooked, but they can be excellent indicators of our health. Healthy nails are typically smooth, strong, and have a consistent colour. Any abnormality in colour or texture could be a sign of a larger health issue. Here are some common fingernail issues and what they might indicate:
- White nails can be indicative of several conditions, including anemia, liver disease, heart disease, diabetes, rheumatoid arthritis, or kidney disease. White spots, known as leukonychia, are generally harmless and are usually the result of minor trauma. However, they can sometimes indicate liver or kidney failure if accompanied by other symptoms.
- Yellow nails are often a sign of a fungal infection, smoking, or the use of certain types of nail polish. In some cases, yellow nails could indicate more serious conditions such as thyroid issues or diabetes.
- Ripples or wrinkles on the nail that are parallel to the fingers are usually a sign of aging or trauma. However, if the ripples are perpendicular to the fingers, they could indicate skin conditions like eczema or psoriasis. Ridges on the nails can also be caused by a lack of nutrients such as iron, calcium, or zinc.
- Cracking or splitting nails could be a sign of a fungal infection, malnutrition, or thyroid disease.
- Clubbing nails are thick, round, and curved, causing the fingers to swell. This condition can develop over several years and may be a sign of liver or kidney disease, lung disease, or gut disorders.
It is important to note that nail abnormalities do not always indicate a serious medical condition and could be due to reactions to nail paints or medications. If you notice any persistent changes in your nails, it is recommended to consult a dermatologist to rule out any potential health concerns.
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Fingernail abnormalities
Beau's Lines: Depressions that run across the fingernail, known as Beau's lines, can occur due to malnutrition, illness, injury to the nail, eczema, chemotherapy, or certain diseases like measles, mumps, or scarlet fever.
Brittle Nails: Nails that break or crack easily can be a normal part of ageing or a result of certain diseases and conditions. Proper nail care, including keeping nails short and moisturized, can help prevent brittleness.
Koilonychia (Spoon Nails): This condition is characterized by fingernails with raised ridges and an outward scoop, resembling a spoon. Koilonychia is associated with iron deficiency anaemia and can be identified by flattened nails with concavities.
Leukonychia (White Nail Syndrome): Non-uniform white spots or streaks on the nails, often referred to as leukonychia, can be caused by minor trauma, drugs, or disease. While usually harmless, leukonychia may sometimes indicate poor health or nutritional deficiencies.
Onycholysis: In this condition, the nails become loose and may even detach from the nail bed, making them susceptible to rapid damage and debris collection.
Paronychia: An infection around the nail, often caused by the yeast-like organism Candida, resulting in inflammation (redness and swelling) at the base of the nail and noticeable changes in the nail itself.
Pitting: Small depressions on the nail surface, accompanied by crumbling and potential nail loss. Pitting is associated with underlying conditions such as psoriasis and alopecia areata.
Ridges: Tiny, raised lines that develop across the nail or up and down can be indicative of nail abnormalities.
It is important to consult a healthcare professional if you notice any persistent or concerning changes in your fingernails. Proper nail care, including trimming, moisturization, and avoiding biting or tearing, can help maintain nail health and prevent some abnormalities. Additionally, using vitamin biotin supplements and protein-infused clear nail polish can strengthen weak or brittle nails.
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Frequently asked questions
Onycholysis.
The symptoms of onycholysis include fatigue, feeling cold, dizziness or weakness, headaches, a sore tongue, and a fast heartbeat.
Onycholysis can be caused by several factors, including fungal infections, certain medications, an overactive thyroid, iron deficiency, and working with the fingers or toes in a wet environment.
Treatment for onycholysis includes trimming the nail, wearing gloves, avoiding nail products and irritants, changing medications, using supplements, or taking medications to treat a nail infection.
If your fingernail falls off, it's important to protect the sensitive skin of the nail bed. You can cover it with a band-aid or coat the nail with a layer of nail hardener to protect the nail plate.











































