Scars and striae, commonly known as stretch marks, are forms of skin damage that result from healing processes and skin stretching, respectively. Scars arise from cuts, burns, surgeries, or other injuries and involve fibrous tissue replacing normal skin after an injury. Striae appear as linear streaks on the skin after rapid stretching of the skin due to pregnancy, growth spurts, or significant weight changes. The most effective treatments for scars and striae include topical treatments like silicone sheets and retinoids, laser therapy, and microdermabrasion. These methods reduce visibility, improve texture, and promote a more uniform skin tone.