Wear a good sunscreen every day to prevent dark marks, freckles and moles from getting any darker, and to protect your skin. Apply tissue oil all over your body when you get out of the shower to help prevent stretch marks. If your skin changes from oily to dry, or vice versa, make sure you change your daily skincare routine accordingly. Treat blemishes with a good blemish cream, and don’t pick! This will only leave you with scars.