If a fingernail or toenail has a new or changing dark streak, it’s time to see a dermatologist for a skin cancer check. That dark streak could be melanoma, the most serious type of skin cancer. Not every dark streak is a melanoma, but it’s always good to have a dermatologist examine one. Caught early and treated, that may be the only treatment you need. If a nail starts to lift up so that it’s no longer completely attached, you’ll likely see white discoloration, as shown here. If you have redness and swelling around a nail, you may have an infection. When diagnosed early, you can often treat an infection with soaks and antibiotics. If an open sore forms, you’ll need more extensive treatment. When bacteria cause a nail infection, the nail can turn greenish black as shown here. Without treatment, a nail infection tends to worsen. Treatment can get rid of your pain and tenderness and help clear the infection. If you have dents in your nails that look like they were made by an icepick, this could be a sign that you have a disease that affects your entire body. Wearing red nail polish without a base coat or smoking can turn your nails yellow. If your nails turn yellow, thicken, and seem to stop growing, it could be a sign of something going on inside your body. Lung disease and rheumatoid arthritis can cause yellow nails. You may also have a serious nail infection, which requires treatment. Nail gnawing is a fundamental driver of intense paronychia, a sort of contamination where microbes get underneath the tissue along the edge of the nail and cause expanding and disturbance. Monotonous picking at your thumbnail and fingernail skin with your pointer can deliver a line of even bring forth stamps in the nail. In extraordinary cases, the nail can part. A subungual hematoma seems dull red under the nail. The finger or toe is agonizing and may pulsate. Treatment for a subungual hematoma is planned for alleviating pressure by depleting the blood caught under the nail. For a little hematoma, you can warm a needle or the finish of a paper cut until it is intensely hot. Utilizing delicate weight, the hot tip can infiltrate the nail, making a little opening through which blood can deplete. The nail may remain stained after the strategy. A few people don't feel good doing this comfortable. Your doctor can give a similar treatment in their office utilizing a sterile sharp edge or needle. On the off chance that blood takes up the greater part of the zone under your nail, a doctor ought to assess the nail. At times, the nail may should be evacuated so a profound tear can be fixed with join.  In the event that the nail is torn or rough, you should trim it to abstain from catching it on things and further harming it.If your nail lifts totally off the nail bed, it might be most agreeable at first to supplant the nail and hold it set up with a wrap.