* Hair beneath the skin: When you shave, you're cutting the hair off at the surface of the skin. The remaining hair shaft beneath the skin's surface can still be visible, creating the appearance of dark dots or shadows. This is especially noticeable if you have dark or thick hair.
* Ingrown hairs: Shaving can sometimes cause hair to curl back into the skin and become ingrown. These ingrown hairs can cause inflammation and dark spots.
* Skin irritation: Shaving can irritate the skin, leading to post-inflammatory hyperpigmentation (PIH). This is when the skin produces extra melanin in response to the irritation, causing dark patches or spots.
* Shadowing: Even without irritation, the blunt cut of the hair can cast a shadow on the surrounding skin, making the area appear darker.
* Dull razor: A dull razor can tug at the hair, causing more irritation and potentially contributing to PIH.