Which of the following is a potential side effect of laser skin resurfacing?

Pigmentation changes can occur as a potential side effect of laser skin resurfacing due to the way the procedure interacts with the skin's pigment-producing cells. During laser resurfacing, the laser energy removes the outer layers of skin, which can lead to an inflammatory response. This inflammation can affect the melanocytes, the cells that produce melanin, resulting in either hyperpigmentation (darkening of the skin) or hypopigmentation (lightening of the skin) in the treated area. Such changes are particularly significant in individuals with darker skin tones, as they can be more prone to post-inflammatory hyperpigmentation.

The other options mention benefits or improvements related to the skin but do not pertain to side effects. Improved skin texture refers to the enhanced smoothness and appearance of the skin after the procedure, increased hydration pertains to moisture retention, and enhanced skin color is generally a desired outcome rather than a side effect. Therefore, while those outcomes are typically sought after through treatment, pigmentation changes stand out as a notable and possible adverse reaction following laser skin resurfacing.