Anti Wrinkle injections prevent lines from getting worse over time. Treating the muscle with anti wrinkle injections will weaken the muscle over time. This means that the lines will not be as bad when the anti-wrinkle injection wears off. Also when the lines are relaxed, collagen remodelling repairs the damaged collagen beneath the wrinkle line and “fills in” those lines. This effect becomes more apparent with repeated injections and in many cases causes the lines to disappear over time.