1. ingrown hairs
   acne
2. the surface layer of skin

Microdermabrasion wears away the surface layer of skin.

1. stratum corneum
   epidermis
2. dermis

The stratum corneum is the uppermost part of the epidermis.

1. new skin cells replace the old ones
   no further renewal of the stratum corneum
2. increased moisture in the skin

The healing process brings with it newer skin cells that look and feel smoother.

1. makes them less effective
   makes them more effective
2. has no effect

Without the stratum corneum acting as a barrier, medicinal creams and lotions are more effective because more of their active ingredients and moisture can find their way down to the lower layers of skin.

1. tearing of the skin
   increased breakouts
2. removal of deeper blemishes

Early studies suggest that repeated microdermabrasion treatments at regular intervals may influence the way the lower layers of skin grow, plus they may remove deeper lines and blemishes over time.

1. swelling of the skin
   reddening of the skin
2. both

In the first hour after treatment, mild swelling and redness can occur. Depending on the individual, these side effects can last anywhere from an hour to two days.

1. a clinic
   home
2. either

You can have microdermabrasion performed in a clinic or spa with professional equipment. Or, you can do it yourself with a product designed for home use.

1. water
   crystals
2. sand

A microdermabrasion tool shoots a stream of tiny crystals, like aluminum oxide, sodium chloride or sodium bicarbonate onto the skin.

1. a vacuum
   a scraper
2. It doesn't collect used crystals.

The vacuum action collects used crystals and dead skin for disposal.

1. The same way professional kits do -- with a special tool.
   through creams and scrubs
2. Kits for at-home use don't have crystals.

Home kits contain the same crystals you'd find in a professional treatment, but most offer them in creams and scrubs rather than delivered through a specialized tool.