Thank You for your question. For glabellar lines (or frown lines / "11" lines), we inject Botox into the muscle, causing the muscle to weaken and improving the appearance of the lines. Botox works by binding to receptors that send nerve signals for muscles to contract. Since your body makes new receptors and neurotransmitters all the time, it needs to be maintained otherwise the wrinkles will slowly return as the muscle regains function over time. Botox takes 2 to 4 weeks to start working and lasts for up to 6 months. For deeper glabella lines or strong 11s, I use a combination of Botox with fillers, lasers and microneedling with PRP. I suggest getting a formal evaluation with an experienced cosmetic dermatologist and expert in lasers and fillers. Best, Dr. Emer