What is a Black-and-Blue Nail
A black-and-blue nail (also called a black nail) is usually caused by sudden or repetitive injury to a toe. This might occur during sports that involve running or stopping quickly. The injury may also result from a heavy object falling on a toe. If your toe is black and blue but not injured, see your doctor immediately.
Prevention
Many nail problems can be prevented by wearing the right shoes and trimming your nails properly. To help avoid infection, keep your feet clean and dry. If you have diabetes, talk with your podiatrist before doing any foot self-care.
The right shoes: Get your feet measured (your size may change as you age). Wear shoes that are supportive and roomy enough for your toes to wiggle. Look for shoes made of natural materials such as leather, which allow your feet to breathe.
Proper trimming: To avoid problems, trim your toenails straight across without cutting down into the corners. If you can’t trim your own nails, ask your podiatrist to do so for you.
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