1. The document discusses various treatment options for acne scarring, including fractional laser therapy, microneedling, and injection of substances like hyaluronic acid, collagen, Sculptra, and platelet-rich plasma. 2. Fractional lasers use wavelengths of 1550 nm and can treat scars by inducing photothermal or photoacoustic effects with energy densities of 10-12 J/cm2. 3. Microneedling is a low-cost treatment that uses tiny needles to induce controlled skin injury and stimulate collagen production.