Dark lines on nails can be a result of finger trauma. The decolorization is usually in a stripe that starts at the bottom of your nail bed and continues to the top. The table below does not include all companies or all available products in the market but those that we promote as their affiliates. The lines may originally be white or clear, but later turn dark or black due to accumulation of nail polish or dirt inside the nails. This happens when new skin cells formed below the surface of the skin come up to replace the dead cells that are cast off from the top. Please consult your healthcare provider with any questions or concerns you may have regarding your condition.Your use of this website indicates your agreement to this websites published terms of use and all site policies. Melanonychia is caused when the pigment cells, called melanocytes, deposit melanin into the nail. If your melanonychia is caused by medication, your doctor may change your medication or have you stop taking it for a time, if that is possible. Complications depend on the cause of melanonychia. Black lines may not always be directly related to mole growth or melanoma, but could also be caused by aging, nutritional issues, arthritis, fungus infections, or a heart infection. You may not need to be concerned about this, and it may persist up to a few months after birth. Picking off nail polish and pressing on your nails can cause them to peel. It can occur due to blood vessel inflammation or capillary damage and affect one or multiple nails. A dark mark on your nail might be more serious than you think. Melanonychia may also be called melanonychia striata or longitudinal melanonychia. Ridges are among the different kinds of nail abnormalities that can develop due to aging , nail injury, or trauma , or underlying medical conditions. In some cases, these lines are harmless. It may not be alarming, but a visit to a physician’s clinic can help rule out the following: This condition is commonly referred to as splinter hemorrhage or the bleeding underneath the fingernail. For utmost sun protection, use your sunscreen before the stated expiration date…, Deodorant allergy is a reaction to antiperspirant or deodorant. The decolorization is usually in a stripe that starts at the bottom of your nail bed and continues to the top. The B-Vitamins play a key role in the growth of cells. This condition requires the removal of the tumor which may also include amputation of your finger or toe. When you see discolored vertical lines on your fingers running along the ridges in fingernails, it may be a call for concern. The outlook for most benign melanonychia is good, and in most cases, does not require treatment. However, if you have not done anything to hurt your fingernails, an appointment with an expert is your best choice. © What Causes Some Men to Have Dry, Brittle Hair and How to Treat It, deformity in your foot that causes friction with your shoes, taking antibiotic or antifungal medications, if an infection is the cause, treating the underlying disease or medical condition causing the melanonychia, over two thirds of the nail plate is discolored. At GorgeousGirl, our staff is a collection of highly skilled cosmetologists, estheticians, and higher education professionals. Here are ways on how you can do that: If the black line is caused by either a wood splinter or pencil lead that has been lodged under your fingernails, you can easily remove it with the use of a tweezer. Black lines on finger nails, there are many reasons for this. Melanocytic hyperplasia may be caused by: Other causes of melanonychia beyond the two primary types may include: People of African descent are the most likely to experience melanonychia. Black Line on the Nail: Should You Worry? This physical exam includes looking at whether your nail is deformed in any way, how many nails have melanonychia, as well as the color, shape, and size of your melanonychia. Black line on the nail A narrow black line that has formed vertically underneath your nail is called a splinter hemorrhage. The nail biopsy can also cause nail deformity because it removes a portion of the nail. Disclaimer: The information provided on this site is intended for your general knowledge only and is not a substitute for professional medical advice or treatment for specific medical conditions. The NHS advises you get any dark lines on your nails checked by doctors. 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