What type of scar remains within the boundaries of the original wound?

A hypertrophic scar is characterized by its tendency to remain within the boundaries of the original wound. These scars occur due to an overproduction of collagen during the healing process, which leads to a raised appearance that does not exceed the original wound area. Hypertrophic scars often improve over time; they can become less prominent and may flatten or fade.

In contrast, keloid scars extend beyond the original wound area, forming raised and thickened tissue that can be larger than the original injury. Open scars refer to wounds that are not fully closed and can include a variety of healing processes, meaning they do not pertain specifically to scar formation. Normal scars typically blend more seamlessly with the surrounding skin and do not exhibit the raised characteristics seen in hypertrophic scars.