Liam Carter
A black fingernail is usually the result of direct trauma to the finger, which causes blood to gather underneath the nail. This is known as a subungual hematoma, and it can be extremely painful. In some cases, the nail may fall off on its own, or a doctor may need to remove it. However, it's important to note that melanonychia, a condition that causes black or brown lines in the nail, can also lead to nail discolouration.
| Characteristics | Values |
|---|---|
| Cause | Direct trauma to the finger |
| Colour | Reddish-purple, dark brown, black |
| Pain | Throbbing, intense |
| Treatment | Ice, elevation, anti-inflammatories, decompression, cautery, removal of the nail |
| Prevention | N/A |
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What You'll Learn
A black fingernail can be caused by a subungual hematoma
A black fingernail can be the result of a subungual hematoma, which is a blood blister under the nail. This occurs when blunt force crushes the small blood vessels under the nail bed, causing bleeding and bruising. While small hematomas may not require medical attention and can heal on their own, larger hematomas can be extremely painful and may cause the nail to fall off partially or completely due to the pressure of the blood.
If a subungual hematoma is causing pain or covers a significant portion of the nail, it is recommended to seek medical attention within 48 hours of the injury. Doctors can perform a procedure called trephination or cautery, which involves drilling a small hole in the nail plate to drain the accumulated blood and relieve pressure and pain. This procedure is most effective when performed before the blood coagulates.
To manage a subungual hematoma at home, it is recommended to elevate the affected hand or foot, apply a cold compress to reduce pain and swelling, and use compression to slow the bleeding under the nail. However, if home measures do not provide relief, it is important to consult a doctor for further treatment options.
It is important to be cautious when dealing with a black fingernail, as it may indicate a more serious condition. In some cases, nail discoloration can be a sign of skin cancer or other health issues. Therefore, it is always advisable to seek medical advice if you are concerned about the appearance of your nails or if you experience any signs of infection, such as redness, warmth, swelling, or pain.
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A subungual hematoma is a pool of blood under the nail
A black fingernail is a result of blood collecting under the nail, which is called a subungual hematoma. This occurs when small blood vessels under the skin are crushed, causing bleeding and bruising. The blood pools below the nail plate, creating pressure and causing pain and discolouration. The colour may change over time as the injury heals, from red or purple to dark brown or black.
Subungual haematomas rarely lead to complications, but they can be extremely painful. In some cases, the pressure generated by the pooled blood can cause the nail plate to lift and separate from the nail bed. If the subungual haematoma is large, it can increase the risk of the fingernail falling off. Therefore, doctors may drain the accumulated blood by drilling a small hole in the nail plate to relieve the pressure and pain. This procedure is called trephination or decompression. It is important to get this done within 24 hours, before the blood coagulates.
Small subungual haematomas may not require medical treatment. To manage pain and reduce swelling, the affected area can be iced and elevated, and over-the-counter anti-inflammatories can be taken. However, if there is intense pain or pain that worsens over time, it is important to seek medical care. A healthcare provider will examine the nail and determine the appropriate course of action.
In most cases, a subungual haematoma is not serious, and the bruise will grow out over time. However, it is important to be cautious as the trauma that caused the bruised nail may have resulted in further damage. If there is any doubt about the severity of the injury, it is recommended to seek medical attention.
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A black fingernail can be caused by blunt force trauma
A black fingernail can be the result of blunt force trauma, which can cause a subungual hematoma, or blood under the nail. This can happen when the small blood vessels under the nail are crushed, causing them to bleed and the nail to turn purple, black-and-blue, or black-and-purple. This type of injury can result in intense pain and throbbing as blood collects under the nail, creating pressure.
While this type of injury is not usually serious, it is important to seek medical attention if there is a severe blow to the finger, as there may be broken bones or damage to the nail bed or surrounding tissues. A doctor may recommend a simple procedure called trephination, which involves draining the accumulated blood by drilling a small hole in the nail plate to relieve pressure and pain. This procedure should be done within 24 hours before the blood coagulates.
In most cases, a black fingernail due to blunt force trauma will not require medical treatment and can be managed with home care. It is recommended to ice the area to reduce swelling and take over-the-counter anti-inflammatories for minor pain. It is important to leave the nail alone and allow the new nail to grow underneath and push up the old nail. Protecting the sensitive skin of the nail bed with a Band-Aid is also suggested.
While it is uncommon, a black fingernail can be a sign of something more serious, such as subungual melanoma, a rare form of skin cancer. Therefore, it is important to see a doctor if there is no history of injury or trauma to the nail, as further evaluation and referral to a specialist may be necessary.
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A black fingernail may fall off if the injury is severe
A black fingernail is usually the result of direct trauma to the finger, which causes blood to bleed and gather underneath the nail. This is called a subungual hematoma. In most cases, subungual hematomas do not require medical attention and can be treated at home. However, if the injury is severe, it is important to seek medical attention.
If the injury is severe and there is a large amount of blood under the nail, the risk of the fingernail falling off increases. In some cases, a doctor may need to drain the accumulated blood by drilling a small hole in the nail plate. If the nail is badly damaged, the doctor may also remove the nail. The nail will most likely fall off on its own if it is not removed.
It is important to note that nail discoloration can be a symptom of other conditions, such as melanonychia, which is the appearance of black or brown lines in the nail. Melanonychia may occur naturally in individuals with a dark complexion, but it can also be a sign of other health issues. Therefore, it is always a good idea to have a doctor check any nail discoloration.
Additionally, severe trauma to the finger can result in broken bones or serious damage to the nail bed and surrounding tissues. In such cases, it is crucial to seek immediate medical attention. The finger or toe may also appear deformed, indicating a severe injury that requires prompt medical care.
While waiting for medical attention, there are a few things you can do to manage the injury. Applying ice wrapped in a cloth or using cold therapy for 10 minutes at a time, every hour can help reduce bleeding and swelling. Elevating the hand can also aid in reducing bleeding and swelling by allowing tissue fluids to flow away from the injury site.
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A doctor can treat a black fingernail with trephination
A black fingernail is typically caused by a subungual hematoma, or blood under the nail, which can be the result of a blunt force injury that crushes the small blood vessels under the nail bed. This can cause severe throbbing or pain as blood collects and puts pressure on the nail bed.
In the case of a black fingernail, a doctor may recommend trephination, a procedure that involves creating a small hole in the nail to release the trapped blood and relieve the pressure and pain. Trephination is a quick, outpatient procedure that can provide immediate relief from pain and discomfort.
During the procedure, the doctor will first numb the affected finger or toe with a nerve block to ensure the patient's comfort. Then, using a needle, electrocautery device, or a special tool designed for trephination, the doctor will gently create a hole in the nail plate (the hard part of the nail) without damaging the delicate tissues underneath.
As the blood drains out through the hole, the patient should experience a significant reduction in pain and pressure. The doctor will then bandage the area with sterile gauze and provide instructions on how to care for the finger or toe during the healing process, which may include keeping the area clean and dry and changing bandages as needed.
It is important to note that trephination is most effective when performed within 24 to 48 hours of the injury, before the blood has a chance to coagulate. Additionally, while rare, there is a small risk of complications such as infection or minor injury to the nail bed, which the doctor will discuss with the patient before the procedure.
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Frequently asked questions
A black fingernail is usually the result of direct trauma to the finger, which causes blood to bleed and gather underneath the nail. This is called a subungual hematoma.
If the area of blood covers more than 25%-50% of your nail, you should see a doctor. They will likely drain the blood by drilling a small hole in the nail. If the injury is minor, you can treat it at home by applying ice wrapped in a cloth for 10 minutes at a time, every hour, and by elevating your hand to reduce bleeding and swelling.
If your nail is badly damaged, your doctor may remove it. Otherwise, the nail will likely fall off on its own. Once the blackened nail falls off, it is a good idea to protect the nail bed with a Band-Aid to prevent dryness and cracking.
Yes, nail discoloration can be a symptom of other conditions, such as melanoma, a serious form of skin cancer. Melanonychia, which causes black or brown lines in the nail, can also be benign or malignant. It is important to have a doctor check any nail discolouration to rule out other possible causes.
