The fat cells are then injected to fill sunken cheeks or laugh lines between the nose and mouth, to correct skin depressions on indentations, to minimize forehead wrinkles, to improve step-offs around the eyelids and to enhance lips. Another excellent area for fat injection is the hand. As we age, the fat at the back of the hands may atrophy or go away.

The tendons and veins on the back of the hands become more visible, giving the hands an irregular contour full of blue and white "cords." Fat injection into such hands can replace lost fullness thereby correcting contour. The fat will also serve to hide tendons and veins on the back of your hands which are one of the typical signs of aging. As the injected autologous fat is harvested from you, it tends to last longer than injected bovine collagen.

Either local anesthesia with some sedation or general anesthesia may be used with this procedure. The fat is withdrawn using a special instrument so as not to injure the fat cells. The art of fat injection is in the removal of and processing of the fat so as not to injure the delicate fat cells. The prepared fat cells are next gently injected into the desired site with a special needle.

As some of the injected fat cells resorb over the following weeks, overfilling is necessary. The swelling associated with fat injection tends to be more severe than with collagen. You may notice swelling especially at the lips for 2 weeks.

If a large area was treated, you should limit your physical activity for a brief time until the injected fat has set into its new location. Many patients, however, are able to resume their normal activity immediately. You can expect some swelling, bruising, or redness at both the donor and recipient sites. The severity of these symptoms depends on the size and location of the treated area, as well as the extent of liposuction at the donor site.

The swelling and puffiness at the recipient site may last several weeks, especially if a large area was treated. You should stay out of the sun until the redness and bruising subsides--usually 3 days. In the meantime, you may use makeup with sun-block to conceal any signs of your procedure.

The duration of effects of the fat injection varies from patient to patient. Though some patients have reported results lasting over several years, the majority of patients notice some decrease in fullness within the first 6 months.