Why do some injuries result in a permanent scar, whereas others simply heal after a few days?

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Why do some injuries result in a permanent scar, whereas others simply heal after a few days?

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There are many things that into consideration, such as how deep the wound is, what was used to make it, severity, etc.

The severity of a scar depends on many factors, such as:

Location of the wound

How well the wound is protected during healing

Whether or not the wound requires sutures

The depth of the wound

The nature of the wound (a fine, thin blade generally causes less damage than something like a chainsaw)

Genetics

You have two parts to your skin. The top layer you’re familiar with. but the bottom layer has the thing that makes your skin. A shallow enough injury will only harm that top layer, which can be easily repaired with the normal process of skin growth and shedding.

But that deeper layer, where it comes from, gets compeltely messed up when injured. It doesn’t quite reorganize itself back into the original form. This causes the changes that we know as scars .

Wound nurse here: It depends on how deep the wound goes. Very basically top layer is the epidermis this sort of zippers into the dermis 2nd layer, below that is subcutaneous tissue. Wounds that extend into the epidermis only will not leave a scar. Wounds extending to the dermis may or may not depending on depth and structures held in the dermis. Anything beyond that will heal with scarring.