Microdermabrasion is a light cosmetic procedure that uses a mechanical medium for exfoliation to gently remove the outermost layer of dead skin cells from the epidermis. Most commonly, microdermabrasion uses two parts: a fine abrasive tip and a machine based suction to gently lift up the skin during exfoliation. It is a non-invasive procedure and may be performed in-office by a trained skin care professional. Microdermabrasion is a fairly simple, easy, painless, non-invasive, skin rejuvenation procedure that helps diminish the appearance of superficial hyperpigmentation, and photo-damage, as well as diminish fine lines, wrinkles, acne, and shallow acne scars. A further benefit of microdermabrasion is enhanced skin penetration by other skin creams and serums. Removing dead skin (startum corneum of the epidermis) will aid in the penetration of skin care products and medications by up to 10-50%. The controlled skin exfoliation afforded by microdermabrasion will afford make-up and self-tanning products to go on much more smoothly. The vacuum pressure and speed are adjusted depending on the sensitivity and tolerance of the skin. Microdermabrasion is often compared to the feeling of a cat licking the skin- a rough but gentle texture. Typical microdermabrasion sessions can last anywhere from 5–60 minutes. Minimal to no recovery time is required after microdermabrasion and most people immediately return to daily activity after a session. Makeup and non-irritating creams can usually be applied within a few hours or right after microdermabrasion. Since human skin typically regenerates at approximately 30 day intervals, skin improvement with microdermabrasion is temporary and needs to be repeated at average intervals of two - four weeks for continued improvement. Multiple treatments in combination with sunscreen, sun avoidance, and other skin care creams yield best results.