What can improper use of microdermabrasion lead to?

Improper use of microdermabrasion can indeed lead to hyperpigmentation. This occurs because microdermabrasion, which is a mechanical exfoliation method that removes the uppermost layer of dead skin cells, can cause irritation or trauma to the skin when not performed correctly. If the treatment is too aggressive or if it is done on sensitive skin types, it may trigger an inflammatory response, leading to post-inflammatory hyperpigmentation. This is especially true in individuals with darker skin tones, as they are more susceptible to hyperpigmentation issues after skin trauma.

In contrast, the other options do not accurately reflect the outcomes associated with improper microdermabrasion. For example, excessive microdermabrasion does not lead to increased skin thickness; instead, it may thin the skin's surface over time. Improved skin hydration is generally a benefit of proper exfoliation techniques, not a consequence of improper use. Lastly, decreased skin sensitivity would not occur due to improper use; rather, the skin could become more sensitive due to inflammation and irritation.