Black and blue mark?: A bruise, or “contusion,” appears on the skin due to trauma. Examples of trauma are a cut or blow to the area. The injury causes capillaries to burst. The blood gets trapped below the skin's surface, which causes a bruise. Cellulitis on the other hand is a common skin infection that happens when bacteria spread through the skin to deeper tissues. Sounds like you have more than cellulitis.
Answered 8/4/2020
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Discoloration: Yes, after the initial swelling and redness has passed., Discoloration may come afterwards. As long as you are symptomatically feeling better i.e. noticeably less warmth, pain and swelling, the discoloration will pass in time. Cbeck with your family physician as well and have a great day.
Answered 6/18/2018
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