"The Ache: Treatments to minimize wrinkles and scars from acne or chickenpox can involve multiple doctor visits with long recuperation periods, and often aren’t recommended for people with suntans or darker skin.
The Claim: A therapy called micro-needling—in which a device delivers tiny needle pricks to stimulate the skin’s natural healing processes—can minimize wrinkles and improve the appearance of scars in all skin types and with minimal recovery. Dermatologists and aestheticians typically offer the treatment, but home devices are also available.
The Verdict: Several published studies have found micro-needling, when applied by a doctor, is effective against acne scars. But dermatologists urge caution in doing it at home because of the risk of infection and scarring. And a recent scientific paper detailed three cases of an allergic reaction caused by serums applied after the therapy at a spa."