Liam Carter
A bruised nail, also known as a subungual hematoma, is a common injury resulting from blunt or crush trauma to the fingernail or toenail. It occurs when blood collects and pools under the nail plate, causing pressure and pain. The injury can be extremely painful and may take weeks or even months to heal completely. Bruised nails are often associated with sports, manual labour, and accidents involving the fingers or toes. Treatment options range from self-care practices to medical procedures, depending on the severity of the injury.
| Characteristics | Values |
|---|---|
| Medical term | Subungual hematoma |
| Cause | Trauma to the nail, such as dropping a heavy object on the toe or finger |
| Appearance | Darkened area under the nail, which may look black-and-blue |
| Symptoms | Severe, throbbing pain, swelling, nail discoloration |
| Treatment | Trephination (decompression), cautery, stitches, self-care practices at home |
| Prevention | Wear proper-fitting shoes, stretch and recover legs and feet after physical activity, try physiotherapy exercises |
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What You'll Learn
Subungual hematoma
A subungual hematoma is a bruised fingernail or toenail resulting from blunt or crush trauma. It is a common injury, especially among athletes, manual labourers, and construction workers. Subungual hematomas are typically minor injuries, but they can be extremely painful, and the pain can take weeks or even months to get better.
Subungual comes from the Latin 'sub' meaning 'under' and 'ungual' meaning 'nail'. A hematoma is a solid swelling of clotted blood within the tissues of the body. Therefore, a subungual hematoma is when blood collects and pools under the hard part of the nail (nail plate), causing pressure and pain. The colour of the bruise may change over time as the injury heals.
If you have a subungual hematoma, you should seek medical care within two days. A healthcare provider will look at your nails, ask about your symptoms, habits, and activities, and what might have caused the injury. They may also ask you to move or bend your finger or toe to evaluate the extent of the injury. Imaging tests such as X-rays or ultrasounds may be required to check for broken bones or other injuries.
Small subungual hematomas can be treated at home with ice, elevation, and over-the-counter anti-inflammatories. Larger bruises may require urgent medical care or surgery to prevent complications such as infection or recurrence. The standard surgical procedure for large bruises is trephination, which involves inserting a small hole in the nail to drain the blood and relieve pressure.
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Traumatic causes
A bruised nail, also known as a subungual hematoma, is usually the result of some form of trauma to the nail. This can be a heavy object falling on the toes or finger, a crush injury, or a direct blow to the nail. The primary cause is direct force, which causes the blood vessels under the nail to rupture and pool under the nail bed, leading to a bruised appearance. This can be extremely painful due to the pressure exerted on the nerves.
Subungual hematomas are often minor injuries, but they can be very painful, and the pain can last for weeks. The injury can also lead to further damage, such as a broken bone or deep cut, which would require additional treatment and a longer healing time. In some cases, the nail may fall off immediately or weeks after the injury.
Bruised nails are a common injury, especially among athletes, dancers, and those who work in manual labor or construction. These are all activities that can cause repetitive stress or trauma to the toes and fingers. Wearing open-toed shoes or sandals frequently can also increase the risk of a bruised toenail, as the toes are more exposed and not protected by closed shoes.
If you have a bruised nail, it is important to seek medical care, especially if there is intense pain or signs of infection, such as pus or redness around the nail. A healthcare provider will examine the nail and may perform imaging tests, such as X-rays or ultrasounds, to check for any underlying issues or broken bones. They may also perform a simple procedure called trephination or decompression to drain the blood and relieve the pressure and pain. This procedure is most effective if done within the first 48 hours of the injury, as the blood will clot after this time, leading to prolonged pain.
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Risk factors
Bruised nails, also known as subungual haematomas, are usually the result of accidental trauma or injury. This could be from stubbing a toe, dropping a heavy object on your toe, or crushing or slamming your finger in a door.
There are several risk factors that can increase the likelihood of experiencing a bruised nail. These include:
- Participating in sports activities that involve repetitive stress or trauma to the toes or fingers, such as soccer, dance, or long-distance running.
- Wearing open-toed shoes or sandals frequently, especially if you live in a warmer climate.
- Working in jobs that require repetitive motions or manual labour, such as construction.
- Having a bleeding or blood clotting disorder, such as coagulopathy or peripheral vascular disease.
- Having a health condition that alters pain processing, such as diabetic neuropathy, which can delay treatment-seeking and increase the risk of complications.
- Pre-existing damage to the nail bed or surrounding tissues, which can increase the severity of a new injury.
- Deformed fingers or toes, or existing injuries to nearby joints, which can increase the risk of further trauma.
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Diagnosis and treatment
If you notice a bruised nail, it is important to seek medical care within two days to prevent weeks of unnecessary pain. A healthcare provider will examine your nail and ask about your symptoms, habits, activities, and potential causes of injury. Depending on the symptoms and causes, they may order additional tests, such as X-rays, blood tests, or a lab examination of the nail matrix.
Small bruises, covering less than 25% of the total nail area, often heal with self-care and preventative measures. These measures include wearing proper-fitting shoes, stretching and recovering your legs and feet after physical activity, and trying physiotherapy exercises to manage pain and improve movement.
For larger bruises, urgent medical care or surgery may be required to prevent complications such as recurrence or infection. A procedure called trephination or cautery can be used to drain the pooled blood and relieve pressure and pain. Trephination involves inserting a small hole in the nail using a needle or electrocautery (heat from an electric current). Cautery involves using a heated wire or carbon laser to burn a hole in the nail. These procedures are quick, painless, and effective in reducing pain and promoting healing.
In severe cases, especially when there is injury to the nail bed or surrounding tissues, the entire nail may need to be removed, and stitches may be required to repair the damage. Even with proper treatment, there is a chance that the new nail may not grow back normally. Therefore, it is essential to seek medical attention promptly if you experience any symptoms of a bruised nail or related complications.
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Prevention and recovery
Bruised nails, or subungual hematoma, are common injuries, especially among athletes and people who work in manual labor. They are caused by trauma to the nail bed, such as dropping a heavy object on your toe, which causes blood to collect under the nail. While it is difficult to prevent bruised nails due to the unexpected nature of such injuries, there are some measures you can take to lower the risk. These include wearing properly-fitting shoes, stretching and recovering your legs and feet after physical activity, and keeping your toenails trimmed and short.
If you do suffer a bruised nail, it can usually be treated with self-care practices and over-the-counter medications at home. Small bruises, which make up less than 25% of the total nail area, typically heal on their own. However, larger bruises may require urgent medical care or surgery to prevent complications such as infection or recurrence. If you experience persistent pain, heightened redness or warmth around the nail, or any discharge, these could be signs of infection, and you should seek medical attention.
To heal a bruised nail at home, you can apply a cold compress or ice to the injured area to reduce swelling and numb any discomfort. Wrap the ice in a light or soft cloth first to avoid direct contact with your skin. You can also try alternating between warm foot soaks and cold compresses to manage pain and reduce swelling. Keep the injured area clean with mild soap and water, removing any dirt or debris, and ensure you dry it with a clean towel afterward.
While your bruised nail is healing, it is crucial to protect it from further injury. Avoid wearing tight-fitting shoes or engaging in activities that could put pressure on the affected toe. Instead, opt for open-toed shoes or sandals to provide space for the nail to breathe and heal. Depending on the severity of your injury, it may take several weeks to a few months for your nail to return to its normal color. During this time, be gentle with your toe and avoid picking or trimming the nail until it has fully healed.
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Frequently asked questions
A bruised nail, or subungual hematoma, is an injury to your fingernail or toenail that results in bleeding and bruising under the hard part of your nail, known as the nail plate.
A bruised nail is typically caused by blunt or crush trauma to the nail, such as dropping a heavy object on your toe or finger, or participating in sports activities that involve repetitive stress or trauma to the toes or fingers.
Symptoms of a bruised nail include severe pain, swelling, and nail discoloration, which may appear as a black-and-blue bruise.
Small bruises may heal on their own with self-care and preventative measures. Larger bruises may require medical attention, including a simple procedure called trephination, which involves draining the blood to relieve pressure and pain.
While trauma is the main cause of bruised nails, you can help prevent it by wearing proper-fitting shoes, stretching and recovering your legs and feet after physical activity, and trying physiotherapy exercises to manage pain and improve movement.
