Procedure: Mechanical scraping of the top layers of skin using a high-speed rotary wheel. Softens sharp edges of surface irregularities, including acne and other scars and fine wrinkles, especially around the mouth. 
Length: A few minutes to 1 hour. May require more than 1 session. 
Anesthesia: Local, numbing spray, or general. 
In/Outpatient: Usually outpatient. 
Side Effects: Temporary tingling, burning, itching, swelling, redness. Lightening of treated skin. Acute sensitivity to sun; loss of ability to make pigment (tan). 
Risks: Abnormal color changes (permanent). Tiny whiteheads (temporary); infection; scarring; flare-up of skin allergies, fever blisters, cold sores. 
Recovery: Back to work: 2 weeks. More strenuous activities: 4 to 6 weeks. Fading of redness: about 3 months. Return of pigmentation/sun exposure: 6 to 12 months. 
Duration of Results: Permanent, although new wrinkles may form as skin ages.