In darker skin, what can repetitive abrasion and exfoliation by a razor create?

In darker skin, repetitive abrasion and exfoliation by a razor can lead to hyperpigmentation, which is the darkening of the skin in response to irritation or injury. This occurs because the skin produces excess melanin as a protective response to the trauma caused by frequent shaving.

In individuals with darker skin tones, this overproduction of melanin can manifest more noticeably, leading to post-inflammatory hyperpigmentation. The skin's repair process, which aims to heal the area, inadvertently causes darker patches to form, especially if the skin is repeatedly subjected to the friction and irritation of shaving.

Other processes like epilation and depilation refer to different hair removal methods, and reduction does not specifically address the skin changes resulting from razor use. Thus, hyperpigmentation is the condition most directly associated with the repetitive trauma that can be caused by shaving in darker skin.