Caleb Foster
Black toenails, also known as subungual hematoma, are caused by bleeding or bruising underneath the toenail. This is usually the result of trauma or injury to the toe, such as stubbing it or dropping something heavy on it. However, black toenails can also be a sign of an underlying medical condition, such as toenail fungus, melanoma, lupus or kidney disease. As such, it is important to seek medical advice if you have black toenails.
| Characteristics | Values |
|---|---|
| Cause | Trauma or injury to the toe, fungal infection, vitamin deficiency, diabetes, cancer, malignant melanoma, runner's toe |
| Appearance | Black or dark in colour |
| Symptoms | Pain, presence of blood underneath the nail |
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What You'll Learn
Trauma or injury to the toe
A black toenail, also known as a subungual hematoma, is often the result of trauma or injury to the toe. This could be from stubbing your toe, dropping something heavy on it, or having your toenail entangled at the intersection of the toe cap and the toebox. In these cases, the black colour is caused by blood trapped beneath the nail as it dries and clots.
Black toenails can also be caused by a fungal infection, a vitamin deficiency, or a medical condition like diabetes or cancer. In some cases, they may be a sign of malignant melanoma. Therefore, it is important to get black toenails checked by a healthcare professional, as they can be a symptom of a more serious underlying condition.
To prevent black toenails, it is important to take good care of your feet. This includes wearing shoes that fit properly and keeping your feet clean and dry. If you are a runner, make sure your toenails are not too long, and ensure that your shoes are not too loose or too tight.
If you have a black toenail, it may be treated with over-the-counter or prescription medications. In some cases, you may need to see a healthcare provider for treatment.
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Runner's toe
A black toenail, or 'runner's toe', is a condition where your toenail turns black or dark in colour. This is usually caused by blood collecting underneath the nail, due to trauma or injury to the toe. For example, stubbing your toe or dropping something heavy on it. In runners, this can be caused by the nail being too long and the shoe either being too roomy or too tight. In the case of oversized shoes, the foot may slide while running downhill, causing the nail to become entangled at the intersection of the toe cap and the toebox. In contrast, overly tight shoes can pinch and compress the nail, leading to bleeding between the nail plate and the nail bed.
Black toenails can also be caused by a fungal infection, a vitamin deficiency, or a medical condition like diabetes or cancer. They can be painful, but they often go away on their own. However, they can be a sign of an underlying medical condition that needs treatment, such as malignant melanoma. Therefore, it is important to get them checked by a healthcare professional.
To prevent black toenails, it is important to take good care of your feet by wearing shoes that fit properly and keeping your feet clean and dry.
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Underlying medical conditions
Black toenails are not just a cosmetic issue. They can be a sign of an underlying medical condition that needs treatment.
One of the most common causes of black toenails is a fungal infection. This can be treated with over-the-counter or prescription medications. Black toenails can also be caused by a vitamin deficiency, or a more serious medical condition like diabetes, cancer or malignant melanoma. In some cases, they may be caused by an injury that produces a bruise called a subungual hematoma. This is when there is bleeding or bruising underneath the toenail, which causes the nail to turn black or dark in colour as it dries and clots.
Black toenails can be painful, but they often go away on their own. However, it is important to get them checked out by a healthcare professional as soon as possible, as they can be a sign of something serious.
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Toenail fungus
A black toenail, or subungual hematoma, is caused by bleeding or bruising underneath the toenail. This is usually the result of trauma or injury to the toe, such as stubbing it or dropping something heavy on it. The blood trapped beneath the nail turns black or dark in colour as it dries and clots.
Fungal infections are one of the most common causes of black toenails. Toenail fungus is a common condition that can affect people of all ages. It is caused by a group of fungi called dermatophytes, which thrive in warm, moist environments. Toenail fungus typically begins as a white or yellow spot under the tip of the toenail and can spread deeper into the nail, causing it to thicken, discolour, and become brittle. In some cases, the nail may even separate from the nail bed.
If you suspect that you have toenail fungus, there are several treatment options available. Over-the-counter antifungal creams, ointments, or nail polishes can be effective in mild cases. For more severe infections, your healthcare provider may prescribe oral antifungal medications or recommend a procedure called nail avulsion, which involves removing the affected nail.
It is important to note that black toenails can also be a sign of other underlying medical conditions, such as vitamin deficiencies, diabetes, or even cancer. Therefore, if you experience black toenails, it is recommended to seek prompt medical attention to rule out any serious causes and receive appropriate treatment.
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Melanoma
A black toenail is often referred to as a "subungual hematoma", which occurs when there is bleeding or bruising underneath the toenail. This can be caused by stubbing your toe or dropping something heavy on it. As the blood dries and clots, it turns black or dark in colour. Black toenails can also be caused by fungal infections, vitamin deficiencies, diabetes, or cancer.
In some cases, black toenails can be a sign of something more serious, such as malignant melanoma. Melanoma is a type of skin cancer that can develop in the nail unit, which includes the nail bed, matrix, and plate. It is the most dangerous form of skin cancer and can be life-threatening if not detected and treated early.
If you notice any of these symptoms, it is important to see a healthcare provider as soon as possible. They may refer you to a dermatologist or a nail specialist for further evaluation. Diagnosis of melanoma in the nail unit can be challenging, as the early stages may resemble a benign condition called melanonychia striata. However, there are certain features that can help distinguish melanoma from other conditions, such as the width of the streak, the presence of irregular borders, or changes in the surrounding skin.
Treatment for melanoma in the nail unit depends on the stage and extent of the disease. Surgery is often the first-line treatment, which may involve removing the affected nail and surrounding tissue. In more advanced cases, additional treatments such as chemotherapy or radiation therapy may be necessary. While melanoma of the nail unit is rare, it is important to be vigilant and seek medical attention if you notice any changes in your nails. Early detection and treatment are crucial for improving outcomes and survival rates.
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Frequently asked questions
A black toenail is often referred to as a "subungual hematoma" and occurs when there is bleeding or bruising underneath the toenail.
Black toenails can be caused by trauma, such as stubbing your toe, dropping something heavy on your toe, or wearing shoes that are too tight. They can also be caused by toenail fungus, melanoma, or underlying medical conditions such as lupus or kidney disease.
Black toenails are not just a cosmetic issue and can be a sign of an underlying medical condition that requires treatment. It is important to have black toenails checked by a healthcare professional to determine the cause and develop a treatment plan.
