Frown lines between the brows, often the result of years of repeated muscle movement, can range from mild dynamic creases to deep, set-in lines that are visible even when the face is at rest. Botox works by relaxing the muscle responsible for that repetitive creasing, which stops the line from deepening further. But for deeper, more established lines, softening them fully takes time. It's not a one-and-done process, but with consistent treatment every few months, the muscle stays relaxed long enough for the skin to gradually smooth and rebuild on its own.
Most patients see meaningful improvement over a series of treatments, with results becoming more refined with each cycle. Patience and consistency are key to seeing these lines soften significantly over time.