How many units of Botox do I need for my forehead and frown lines?

Asked by Danielle, 34 · September 15, 2026

I am 34 and this would be my first time. I have light forehead lines and a deeper line between my eyebrows. I do not want to look frozen — I just want to look less tired in photos.

2 answers from verified providers

Olivia Hartwell, MD

Aesthetic Medicine · Aesthetic Provider · Nashville, TN

Top answer

For a first treatment on light forehead lines plus the frown area, most patients need somewhere between 20 and 30 units in total, split between the two areas. The exact number depends on how strong your muscles are, not on your age. A good injector will start conservatively, see you again at two weeks, and add a few units if needed — that is much easier than waiting out a result that is too heavy. Expect it to last three to four months the first time, often a little longer after a few treatments.

Ava Sullivan, PA-C

Physician Assistant · Aesthetic Provider · Nashville, TN

I would add one thing: ask your provider to watch your brows while you make expressions before they mark anything. If your brows are already low, treating the forehead too heavily can make them feel heavier. Starting with the frown lines alone is a perfectly good first step.

This guide is for general educational purposes and is not medical advice. Results, recovery and pricing vary from person to person. Consult a licensed provider to find out whether a treatment is right for you.