Hyperactivity of the facial expression muscles often results the development of deep frown lines, forehead lines and/or crown’s feet. Injecting Botox into the affected area temporarily relaxes the underlying muscles responsible for wrinkling, giving the face a more relaxed and pleasant appearance. The wrinkles become smoother or disappear altogether. The initial effect of treatment becomes visible within 48 to 72 hours. The maximum effect is reached in about 1 to 2 weeks. The overall result is very natural and generally lasts for 4 to 6 months.