Basically, the laser energy penetrates the skin and breaks down the scar tissue at a cellular level. This triggers the body's natural healing response, promoting the production of new, healthy collagen to replace the damaged tissue. Different wavelengths target different depths and types of tissue. For raised scars, the laser can help flatten them by breaking down excess collagen. For depressed scars, it stimulates collagen production to fill them in. For discolored scars, it can target the pigmentation. The body then gradually rebuilds the area with more normal-looking tissue over the following weeks and months.