Moisturizing with a lotion full of healthy ingredients such as aloe vera or shea butter can help reduce the appearance of scars, albeit not as much as a dermal filler. Keep the skin moist while acne heals to reduce the possibility for scarring. Old scars will likely not be affected by moisturizing. Drinking more water is more important because it moisturizes the skin from the inside out. Cocoa butter is another moisturizer known for its possibility to reduce stretch marks. Stretch marks are just another form of scar tissue similar to acne scars.