Yes, it may be used on small areas of hyperpigmentation on the knees or elbows. Please start with the lowest energy level and test on a small area first. Do not use it on broken, irritated, inflamed, or very sensitive skin. Always wear the protective goggles during use, and allow the skin to fully recover between treatments. Results may vary depending on the cause and depth of the pigmentation. For severe or widespread hyperpigmentation, we recommend consulting a dermatologist first.