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Trauma resulting in a subungual hematoma is the most common cause of a black toenail. It may be due to stubbing the toe or dropping something on it. The injury bleeds, and the blood is trapped under the nail, where it darkens. The black toenail may fall off a few weeks after it appears and may take up to six months to grow back.

Black toenails are attributed to a variety of causes, some of which resolve on their own. If your nail doesn't get better, you'll need to see your doctor. ... Toenails can turn black from ...

Why you might have a black toenail. The most common cause for a black toenail is when the nail gets injured, trapping blood under the nail, ... The toenails can become brittle and rigid, and a portion of the toenail can turn a greenish-black color. People who are exposed to long periods of wet or moist environments are also at risk, Dr ...

When to Be Concerned About a Black Toenail. While most black toenails are due to minor issues like bruising or pressure, you should seek medical advice if: The toenail turns black without any known injury; There’s increasing pain or signs of infection (pus, warmth, redness) The nail is lifting or separating; The color or size of the dark spot ...

If the toenail doesn't need to be drained (more on this later), there's nothing you can do to speed up the natural healing process, which involves the body absorbing the bruise and the toenail reattaching seamlessly to the healthy nailbed, Dr. Lobkova says.

turn black or green Experts aren’t sure what causes yellow nail syndrome, but it tends to affect adults over the age of 50. It also often occurs alongside another medical condition, such as:

Black toenails do not typically cause further problems when they result from trauma or pigmentation changes. When treated correctly, fungal infections usually cause no further problems.

Infected nails may turn yellow, brown, or even black as the fungus spreads and damages the nail structure. If left untreated, this condition can lead to brittleness, thickening, and sometimes a foul odor. ... While some dark spot on toenail are harmless, others may signal underlying health issues that require professional evaluation. Seek ...

Toenails are usually semi-transparent but can turn purple, black, green, or yellow, depending on the cause. Several health conditions and other factors can cause toenail discoloration.

The thick, black toenail may also cause pain if it puts pressure on your toe. 1. Injury to toenail. An injury to your toenail will cause your toenail to turn black. The condition is called subungual hematoma, which is basically bleeding under the nail. Along with the black toenail, the injury may also cause swelling, intense pain and throbbing.

Fungal infections—like athlete’s foot—can spread to your toenails and turn them shades of yellow, blue, green, brown, purple and black, explains Sutera. This range in color is unique to fungus, as is the presence of subungual debris—a chalky white substance that lines the nail bed and often carries a funky odor.

If the trauma is severe enough, your nail can turn black from damage to the blood vessels and, in time, fall off. Nail discoloration and age. As you age, your toenails, as well as your fingernails, may begin to turn a light shade of yellow. Nail discoloration is a normal part of the aging process. Yellow nail syndrome

3. Severe discoloration: Nails that turn extremely dark, like black or deep brown, especially if one has not experienced any trauma, should be examined. This could be due to severe bruising under the nail or a sign of melanoma, which is a type of skin cancer.

Here are some possible causes of dark toenails: Fungal infection: Discoloration on toenails is often the result of onychomycosis, a fungal infection that causes changes in the color and thickness of the toenails and may cause the nail to separate from the nail bed. Most fungal nail infections are caused by dermatophytes, which are ...

The blood trapped beneath the nail causes it to turn black or dark in color as it dries and clots. ... What Does a Black Toenail Mean? The presence of a black, purplish, or brownish hue beneath or ...

Typically it would only progress to this stage if a lighter color toenail discoloration went ignored. Severe toenail infections may also present with nail cracking and are best treated by a foot specialist. Finally, red or black toenails, or toenails with dark colored spots should be reported to your primary care physician or a foot specialist.

The symptoms of a fungal infection go beyond an aesthetic change in the toenail. The toenail may not always turn black. It can turn brown, yellow, or green. It can also do the opposite and lead to overly white toenails. Frequently, the nail’s texture will change, becoming thick and hard to trim. Or, it may become brittle and crumble easily.

While toenail fungus is less than ideal, it’s one of the more harmless causes of a black toenail, according to Dr. Greenfield. When fungi get beneath your toenails—say, from wearing wet shoes ...

Trauma can cause toenails to turn black or blue—a classic “bruised” look. This discoloration usually indicates bleeding under the nail. Symptoms and Appearance. If your toenail is darkened and you can remember a recent injury, it’s likely due to trauma. Sometimes, the nail may even lift off if the injury is severe. Diagnosis and Treatment