Derma rollers are not the best for people with acne. If you have active acne they can spread the bacteria, and cause more acne breakouts. In some cases, Derma rollers can also cause more brown spots. Derma roller is a good option for people with fair skin types that have depressed acne scars without active pimples. Using sun protection and a medicated dark spot remover is a safer, more effective way to treat post-acne dark spots and hyperpigmentation.