An interesting question dermatologists sometimes get from their patients is whether bruises can actually lead to scars. The answer to this question is nuanced and depends on the type of bruising and the associated injuries to the skin. In general, most bruising can heal without scarring. However, there are important exceptions.
If the injury that leads to bruising caused a break in the skin, a deep cut, or a gash, it may result in not only a bruise but also a scar. The depth and width of the injury and the body part which was injured are some factors that determine whether a permanent scar develops. Also, if that injury results in a skin infection, scarring is much more likely to occur.