
There are many reasons why someone might have large fingernails. One of the most common causes is nail clubbing, which is a change in the appearance and structure of the nails that can indicate an underlying health condition. This can be caused by lung and heart disease, lung cancer, Crohn's disease, liver disease, hyperthyroidism, and Grave's disease. Other causes of large fingernails include fungal infections, lichen planus, thyroid problems, nail psoriasis, and reactive arthritis. In some cases, large fingernails can be a result of aging, with nails becoming more brittle and prone to breakage.
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Nail clubbing
Causes
Symptoms
The symptoms of nail clubbing include nails that feel soft and sponge-like, warm to the touch, and form a rounded, bulging shape, resembling an upside-down spoon. The nails may widen and wrap around the sides of the fingertips, starting with the thumb and forefinger before spreading to other nails. In the early stages, there may be a floating nail, where the root of the nail becomes separated from the bone.
Treatment
While there is no direct treatment for nail clubbing, addressing the underlying cause can help. Treatment options may include chemotherapy, surgery, radiation therapy, or medications, depending on the specific condition causing the nail clubbing.
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Fungal infections
Fungal nail infections are common and are caused by fungi that live in the environment. Fungi are normally present in and on the body alongside various bacteria. However, when a fungus begins to overgrow, it can cause an infection. Onychomycosis, also called tinea unguium, is a fungal infection that affects either the fingernails or toenails.
Fungal nail infections can occur when fungi enter through small cracks in your nail or the nearby skin. Since fungi thrive in dark, warm, and moist places, your toenails are more likely to be affected than your fingernails. Your toes also have less blood flow than your fingers, which makes it harder for your body to detect and prevent an infection.
Distal subungual infections are the most common type of fungal nail infection and can develop in both fingernails and toenails. When infected, the outer edge of the nail has a jagged appearance with white and/or yellow streaks across the nail. The infection invades the nail bed and underside of the nail. White superficial infections usually affect toenails. A certain type of fungus attacks the top layers of the nail and creates well-defined white spots on the nail. Eventually, these white patches cover the entire nail, which becomes rough, soft, and prone to crumbling. Spots on the nail may become pitted and flaky. Proximal subungual infections are uncommon but can affect both fingernails and toenails. Yellow spots appear at the base of the nail as the infection spreads upward. This infection can commonly occur in people with compromised immune systems.
Yeast causes a fungal infection called candidal onychomycosis, which usually affects your fingernails. The area around the nails is often swollen and inflamed, and the nails may come off entirely. It tends to happen to nails that have been damaged by an injury or another infection. A fungal nail infection can also occur when a fungus attacks the skin under the nail, called the nail bed. Symptoms vary depending on the type of fungal nail infection. They usually start mild and get more serious. At first, you may only see a white or yellow spot under your nail. Over time, this spreads and can turn your whole nail white, yellow, green, or black. The nail may thicken and could be hard to trim. It may start to curl up or down or loosen from the nail bed. Your nail could become brittle and crumble when you touch it.
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Thyroid conditions
An overactive or underactive thyroid can cause nail abnormalities. Thyroid conditions such as hyperthyroidism and Grave's disease can cause nail clubbing, where the tissue beneath the nails thickens and the fingertips become rounded and bulbous. The fingernails curve over the rounded fingertips, giving the appearance of an upside-down spoon. Nail clubbing is usually painless and harmless, but it can indicate a more serious underlying health condition, such as lung or heart disease, that requires medical attention.
Onycholysis, or Plummer's nails, is another nail disorder characterised by the separation of the nail plate from the free margin. It is often associated with hyperthyroidism and hypothyroidism. Onycholysis can also be caused by other factors, such as trauma or nail bed disorders.
Other signs of thyroid disease that can manifest in the nails include:
- Jagged and rough edges around the cuticles
- White vertical ridging on both sides of the nail beds, indicating a selenium deficiency
- Nail splitting at the tips
- Thick, dry, and brittle nails with visible ridges
- Soft, shiny nails that crumble easily
- Slow or fast nail growth
- Peeling, crumbling, or breaking of the nails
- Lifting of the nails
- Curved nails with swollen fingertips and thickening skin above the nail
Thyroid problems can also cause symptoms such as fatigue, hair loss (especially thinning of the outer eyebrows), low libido, dry skin, and unexplained weight gain. If you notice any of these symptoms, it is important to consult a doctor to have your thyroid evaluated.
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Injury or trauma
If the nail is torn, jagged, or completely lifts off the nail bed, it is recommended to trim or bandage the nail to avoid further injury. In the case of a subungual hematoma, a simple drainage procedure can be performed to relieve pain and support healing, but this should be done by a medical professional. It is important to keep in mind that nail injuries can be noticeable until the damaged portion of the nail grows out, which can take about two months for fingernails and four months for toenails.
In some cases, trauma to the nail can also injure the nail matrix, the tissue inside the cuticle where new nail growth originates. This type of injury can result in permanent cosmetic changes to the base of the nail, such as ridges or splits. Additionally, if the trauma causes bleeding under the nail that occupies more than half of the nail area, it could indicate an underlying bone fracture or tissue tear, and medical attention should be sought.
While nail clubbing, a condition where the tissue beneath the nails thickens and the fingertips become rounded, is often genetic and harmless, it can also be caused by injury or trauma. It can be a sign of various medical conditions, including long-term lung or heart disease, digestive conditions, or liver disease. Therefore, it is important to consult a healthcare provider if you notice any sudden changes in your nail appearance, as it may indicate an underlying health issue.
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Skin diseases
Changes in the appearance and structure of your fingernails or toenails can occur as a symptom of an underlying health condition. This is known as nail clubbing. It is often associated with diseases of the heart, lungs, and digestive system.
- Eczema: This can cause Beau lines (depressions across the fingernail) and nail grooves.
- Psoriasis: This may cause pitting, splitting of the nail plate from the nail bed, and chronic destruction of the nail plate (nail dystrophy).
- Nail psoriasis: This long-term skin condition can cause nails to become crumbly.
- Lichen planus: This skin condition can affect the nails, causing them to become brittle or crumbly.
- Fungal nail infections: These can cause nails to become crumbly and are more common in people with diabetes or compromised immune systems.
- Reactive arthritis: An unusual reaction of the immune system affecting the joints, muscles, and other body parts following an infection.
In addition, skin cancers near the nail and fingertip can distort the nail. Subungual melanoma, for example, will normally appear as a dark streak down the length of the nail.
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Frequently asked questions
Some common causes of big fingernails include injury, infection, and skin diseases such as eczema and psoriasis.
Big fingernails can be a sign of an underlying health condition, such as heart disease, lung disease, or liver disease.
Aside from health conditions, certain medications, aging, and nutrition can also affect the appearance of fingernails.











































