Acne & Rosacea
Tips for Treating Acne Scarring in Darker Skinned Patients
PHOENIX — Educate darker skinned patients who seek treatment for acne scars that there is no remedy to make the scars completely disappear.
"Depending on the patient's skin type, the sensitivity of their skin, and how aggressively you treat them, the risk of hyperpigmentation can be relatively modest, or well over 50%. The expected degree of improvement, on the other hand, even with multiple modalities and multiple treatments, is 40%-50%. I think it's very important to explain that," said Dr. Murad Alam at the annual meeting of the American Society for Laser Medicine and Surgery.
Dr. Alam, chief of cutaneous and aesthetic surgery at Northwestern University, Chicago, said that clinicians face certain challenges in treating acne scars in patients of color, including the risk of exacerbation of active acne, risk of focal or diffuse hyperpigmentation or hypopigmentation, risk of nodularity or surface texture change, and risk of minimal effect.
To mitigate risks, Dr. Alam considers oral antibiotics in patients who have any degree of active acne, "even if they get one or two acne pimples once in a blue moon," he said. "If the acne is more than very mild, you may wish to target that as the primary goal and defer treatment of the acne scarring until the acne is under good control."
If the acne is mild, "you can start oral antibiotics at least 1 month before the acne scarring intervention, so they do have something on board to reduce the risk of an acne flare," he said. "You may also consider pretreatment with bleaching agents. I'm personally not that convinced that pre-treatment is that helpful, but post-treatment with bleaching agents is of definite efficacy in mitigating postinflammatory hyperpigmentation."
As for treatment, nonablative resurfacing with mid-infrared lasers, including 1320-nm, 1450-nm, and 1540-nm devices, has been shown to be effective in patients with lighter skin. "This heating process causes collagen remodeling, and can have a modest effect on so-called rolling scars, which can be quite disfiguring," he said.
Another option is ablative resurfacing with non-CO2 fractional lasers such as the 1550-nm laser. "This is one of the most gentle devices in this category, but even so you have risks of postinflammatory hyperpigmentation," Dr. Alam said. "I like to err on the side of being very modest with regard to fluences. It's much better to do more treatments than to push each individual treatment at the risk of having pigmentary abnormalities."