Isla Bennett
Black dots on nails can be caused by a number of conditions. Narrow black lines that start in the nail bed and extend across the entire nail are often the result of melanonychia, which is caused by increased melanin deposits in the nail or changes in nail pigmentation. They can also be splinter hemorrhages, which are caused by small blood vessel damage. While these are often harmless, they can sometimes signal a more serious health issue, such as skin cancer or subungual melanoma.
| Characteristics | Values |
|---|---|
| Name | Splinter haemorrhages |
| Appearance | Narrow black lines that start in the nail bed and extend across the nail |
| Cause | Small blood vessel damage |
| Conditions | Melanonychia, Beau lines, subungual melanoma, endocarditis, onychomycosis |
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Melanonychia
While Melanonychia is typically benign, it is important to be aware of other potential causes of black dots or lines on the nails. One possible cause is splinter haemorrhages, which are narrow black lines that form vertically under the nail due to small blood vessel damage. These can be harmless, but they can also signal a more serious health issue, such as endocarditis. In some cases, splinter haemorrhages may be a symptom of skin cancer, such as melanoma or squamous cell cancer.
Another possible cause of black lines on the nails is Beau lines, which are thick horizontal stripes that occur when nail growth is interrupted or altered in the nail bed. Common causes of Beau lines include infection of the nail bed or injury from impacts or picking. While single Beau lines are usually not harmful, multiple Beau lines can be a symptom of multiple chronic conditions.
If you notice black dots or lines on your nails and are unsure of the cause, it is always best to consult a healthcare professional for proper diagnosis and treatment.
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Beau lines
Black dots on nails can be caused by many conditions. One possible cause is splinter haemorrhages, which are narrow black lines that start in the nail bed and extend across the entire nail. These are often harmless but can sometimes signal a more serious health issue, such as endocarditis or skin cancer. Another possible cause of black dots on nails is melanonychia, which is caused by increased melanin deposits in the nail or changes in nail pigmentation. This can result in narrow black lines that run vertically or horizontally across the nail.
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Endocarditis
Black dots on nails can be caused by a number of conditions. One of these is endocarditis, a serious bacterial infection of the heart valves or the inner lining of the heart. Endocarditis can cause splinter haemorrhages, which are small black lines that form vertically under the nail and resemble a wood splinter. These are caused by damage to small blood vessels. While splinter haemorrhages are often harmless, they can sometimes be a sign of a more serious health issue.
The symptoms of endocarditis can vary but often include fever, fatigue, pale skin, joint pain, and shortness of breath. In some cases, endocarditis can cause red or black spots on the nails, known as splinter haemorrhages. These spots may also be a sign of subungual haematomas, which are caused by trauma or injury to the fingernail or toenail.
If you notice any of the symptoms of endocarditis, it is important to see a doctor as soon as possible. Endocarditis is typically treated with antibiotics, and early diagnosis and treatment can help prevent serious complications. In some cases, surgery may be needed to repair damaged heart valves or to remove infected tissue.
While black dots on nails can be a sign of endocarditis, it is important to note that they can also be caused by other conditions, such as fungal infections or skin cancer. Therefore, it is always best to consult a healthcare professional for an accurate diagnosis and appropriate treatment.
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Subungual melanoma
Black dots on nails can be caused by a number of conditions. One of these is subungual melanoma, a type of skin cancer. This is characterised by a black line that starts in the nail bed and extends across the entire nail. This is known as a splinter haemorrhage and is caused by small blood vessel damage. While often harmless, it can sometimes signal a more serious health issue.
The exact cause of subungual melanoma is unknown, but it is believed to be a combination of genetic, environmental, and lifestyle factors. Risk factors include exposure to ultraviolet (UV) radiation, a family history of melanoma, and a weakened immune system. It is important to note that subungual melanoma is often misdiagnosed as a nail infection or trauma, which can delay treatment and lead to poorer outcomes.
The treatment for subungual melanoma depends on the stage of the disease and the individual's overall health. Surgery is often the first-line treatment, which may involve removing the affected nail and surrounding tissue. In some cases, a digit amputation may be necessary to ensure complete removal of the tumour. Other treatment options include chemotherapy, radiation therapy, and immunotherapy.
If you notice any changes to your nails, such as a new black line or spot, it is important to consult a healthcare professional. While it may be harmless, it could also be a sign of a more serious condition, such as subungual melanoma. Early detection and diagnosis are crucial for improving outcomes and increasing the chances of successful treatment.
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Splinter hemorrhages
Splinter haemorrhages are small black lines that form vertically under a nail. They are caused by damage to small blood vessels and can be the result of an injury or trauma to a fingernail or toenail. For example, bumping your toe can damage the blood vessels along the nail bed and cause bleeding under the nail. Splinter haemorrhages are often harmless but can sometimes signal a more serious health issue. They are associated with endocarditis and can also be a symptom of skin cancer, such as melanoma or squamous cell cancer.
If you have a splinter haemorrhage and are unsure of the cause, it is important to contact your doctor, especially if you are experiencing other symptoms. While this guide can help educate you about these conditions, it is not a substitute for a diagnosis from a healthcare provider.
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Frequently asked questions
Black dots on nails are called splinter hemorrhages.
Splinter hemorrhages are caused by small blood vessel damage. They can develop after injury or trauma to a fingernail or toenail.
Splinter hemorrhages are often harmless, but they can sometimes signal a more serious health issue. They can be a symptom of a type of skin cancer called subungual melanoma.
