Most skin injury types can contribute to scarring.
This includes burns, acne scars, chickenpox scars, ear piercing, scratches, surgical incisions, and vaccination sites.

According to the (US) National Center for Biotechnology Information, keloid scarring is common in young people between the ages of 10 and 20.
Studies have shown that those with darker complexions are at a higher risk of keloid scarring as a result of skin trauma.
They occur in 15 – 20% of individuals with sub-Saharan African, Asian or Latino ancestry, significantly less in those of a Caucasian background and there are no reported cases in patients with albinism.

Keloids tend to have a genetic component, which means one is more likely to have keloids if one or both of their parents has them.
However, no single gene has yet been identified which is a causing factor in keloid scarring but several susceptibility loci have been discovered, most notably in Chromosome 15.
Most skin injury types can contribute to scarring. This includes burns, acne scars, chickenpox scars, ear piercing, scratches, surgical incisions, and vaccination sites.
According to the (US) National Center for Biotechnology Information, keloid scarring is common in young people between the ages of 10 and 20. Studies have shown that those with darker complexions are at a higher risk of keloid scarring as a result of skin trauma. They occur in 15 – 20% of individuals with sub-Saharan African, Asian or Latino ancestry, significantly less in those of a Caucasian background and there are no reported cases in patients with albinism.
Keloids tend to have a genetic component, which means one is more likely to have keloids if one or both of their parents has them. However, no single gene has yet been identified which is a causing factor in keloid scarring but several susceptibility loci have been discovered, most notably in Chromosome 15.
Keloid