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A bruise (also known as a contusion) usually last about 2 weeks. You can determine the age of a bruise by the color of it. It usually is:

day 1-5 the bruise appears black or blue

day 5-10 the bruise is lighter and more or less green or dark yellow

day 10-14 the bruise turns yellow and then fades completely

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12y ago
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12y ago

For your black-blue skin to heal completely the skin needs at least a week to heal itself.

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Q: How long does it take for a black and blue mark to go away?
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