A combination of factors can cause facial lines. It’s not just about the cellular changes that may occur, or reduction of collagen, or damage caused by free radicals from the sun and the environment. Repeated muscle contractions from frowning, squinting, or raising eyebrows cause skin to furrow and fold, gradually resulting in the formation of facial lines. BOTOX® Cosmetic is a quick 10-minute treatment that works beneath the surface and temporarily reduces the underlying muscle activity that causes moderate to severe frown lines, crow’s feet and forehead lines in adults to help them look more youthful. Initial results can be seen in as little as 3-5 days with full results noticeable within 7-10 days and can last up to 4 months.