What Causes a Black Nail After an Injury? Understanding Subungual Hematoma

Discover why your nail turns black after trauma and how to treat it effectively.

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Your nail turns black when you smash it due to bruising and bleeding under the nail, known as a subungual hematoma. The impact causes tiny blood vessels to rupture, leading to blood accumulation, discoloration, and pain. To alleviate discomfort, apply ice and elevate the finger immediately after the injury.

FAQs & Answers

  1. How long does it take for a bruised nail to heal? A bruised nail typically takes several weeks to heal, depending on the severity of the injury.
  2. What should I do if my nail falls off after an injury? Keep the area clean and protected, and consult a healthcare professional for further advice.
  3. Can you prevent a black nail from occurring? While accidents can happen, wearing protective gear and being cautious during physical activities can help minimize the risk of nail injuries.