The most common procedures usually used to remove scars are:

Skin resurfacing:

It can be used to reduce small scars and irregularities on skin surface as well as surgical and acne scars. As the name suggests it, it is all about eliminating the external layers of the skin using an electrical devise that “scratches” the skin. Once skin heals, its surface has a fresh and smooth looks.

Chemical Peel:

Chemical peels are usually done to treat skins that had been damaged by the sun, that have irregular pigmentation and superficial scars. Chemical Peel consists in removing the most superficial layers using a chemical product. Skin regenerates after having its external layer removed, and skin’s appearance improves.

Collagen Injections:

A type of collagen, which comes from purified bovine collagen, is injected under the skin to replace the natural collagen that the body has lost. This collagen can be injected usually as a treatment for wrinkles, scars and naso-labial folds.

Injection of drugs similar to cortisone:

These type of injections soften scars and then reduce their size.

Cryosurgery:

Cryosurgery helps reduce scars by freezing the superficial layers of the skin. Because of the freezing, blisters appear on the skin.

Laser reaffirmation:
This treatment uses high energy light to destroy damaged skin by burning it. This treatment can be applied to reduce wrinkles and scars.

Grafting using sacabocados:

Small skin grafts are used to replace scared skin. Skin if hallowed where the scar is and then the area is replaced with scar free skin (that skin usually comes from the back part of the earlobe) this treatment is frequently used to treat deep acne scars.
Surgical scar removal:

Removing a scar consists in removing surgically a scar and then rejoining skin again. Even though a new scar will appear, the objective of this surgical technique is to make a scar less visible. These procedure is chosen to treat wide or long or too visible scars, as well as for scars that did not heal properly.

Autogenic fat transference:

In autogenic fat transference fat from some other body area is used to be injected in skin. Fat is injected under the skin surface to raise sunken scars. This method is used to correct deep defects caused by nodulocystic acne scars. Since fat can be reabsorbed n skin after a few months, repeating the treatment might be necessary.