Body treatments are essentially a facial for your whole body and leave your skin feeling velvety smooth and soft. The idea behind a body treatment is that is just as important to cleanse, exfoliate, and hydrate the skin on your body as it is the skin of your face.
The most popular body treatment is a body scrub, sometimes called a body polish, salt glow or sea-salt scrub. This is an exfoliating treatment that takes place on a massage table covered with a sheet and a large, thin piece of plastic.
As you lay on your stomach, the massage therapist rubs a mixture of sea salt, oil, and aromatics like lemon into your skin. This exfoliates the skin and leaves it feeling velvety soft.
Once your whole body is scrubbed, which takes maybe ten or fifteen minutes, you shower it all off without soap, leaving a nice coating of oil. It’s an invigorating treatment, and it’s a good idea to get your scrub before your massage if you’re having both.
Variations can come from the essential oils or scrub materials: you might get an orange blossom/peppermint salt glow or a cucumber salt glow, or a body scrub done with coffee grounds, finely ground pecan shells or Napa Valley grape seeds. Sometimes a hydrating lotion is applied afterwards.
A body mask and body wrap often takes place after a scrub. After you rinse off the salt you return to the treatment table. If you’re slathered with mud, algae, or seaweed and wrapped in a thermal blanket, it’s a “detoxifying” treatment that stimulates your metabolic system, speeding its ability to carry away waste products. If the product is cream or lotion, it’s a “hydrating” treatment.
A body wrap can also be a wrapping treatment used to treat cellulite. It sometimes has a diuretic effect that aids in temporary weight reduction.
source: http://spas.about.com/cs/spa101/a/bodytreatments.htm