Detailed answer

Hypertrophic scars are characterized by their raised appearance and are confined to the boundaries of the initial wound. They occur due to an overproduction of collagen during the healing process. In contrast, keloid scars also appear raised but extend beyond the boundaries of the original wound. They are the result of an excessive proliferation of collagen that goes beyond what is necessary for normal wound healing. Keloid scars tend to be larger and have a more irregular shape compared to hypertrophic scars. Additionally, keloid scars have the potential to recur even after removal, whereas hypertrophic scars generally do not. Both types of scars can be caused by factors such as trauma, surgery, acne, or body piercings, but keloid scars are more commonly associated with individuals with darker skin tones.