Most people need 20 to 40 units of Dysport for horizontal forehead lines, with the exact number depending on muscle strength, gender, and how deep the wrinkles are. That range covers the frontalis muscle alone. In practice, the forehead is almost always treated alongside the frown lines between the eyebrows (the glabella), which adds another 50 to 80 units, bringing many patients’ total for the upper face to somewhere between 70 and 120 units of Dysport.
Forehead Lines vs. Frown Lines
When people say “forehead,” they sometimes mean just the horizontal lines that appear when you raise your eyebrows, and sometimes they mean the entire upper face, including the vertical “11” lines between the brows. These are two different muscles and two separate treatment zones, each with its own unit count.
The horizontal lines come from the frontalis, a broad muscle that spans your forehead. Relaxing it requires units spread across several injection points, typically four to eight spots arranged in a row or two rows above the eyebrows. Each point usually receives 5 to 10 units of Dysport, putting the total for this area in the 20 to 40 unit range for most women and closer to 30 to 50 for men with heavier muscle mass.
The frown lines between the brows involve a group of smaller, stronger muscles. The FDA-approved dose for this area is 50 units of Dysport, divided evenly across five injection sites at 10 units each. In practice, women with above-average muscle mass often receive 60 to 70 units, while men typically start at 60 units and may go up to 80.
Why Dysport Units Sound Higher Than Botox
If you’ve looked into Botox before, Dysport’s numbers can seem alarmingly high. They’re not. The two products use different unit scales. The most widely supported conversion ratio is roughly 3 units of Dysport for every 1 unit of Botox. So 50 units of Dysport is comparable to about 17 units of Botox, not 50. Some clinics historically used a 4:1 ratio, but clinical data supports 3:1 as the more accurate equivalence. This is worth keeping in mind when comparing prices or reading about someone else’s treatment.
What Affects Your Unit Count
Your injector won’t simply pick a number from a chart. Several factors shift the dose up or down:
- Gender. Men generally have thicker, stronger forehead muscles and need more units. Clinical protocols start men 10 to 20 units higher than women in the glabellar area, and the same principle applies to the frontalis.
- Muscle strength. If you can create deep furrows when you raise your brows or frown hard, your muscles are strong and will require more product to relax fully.
- Treatment history. First-time patients sometimes start with a conservative dose. After seeing how your muscles respond, your provider can adjust upward at your next visit. People who’ve had regular treatments for years sometimes find they need slightly fewer units over time as the muscles weaken from repeated use.
- Desired result. Some people want a completely smooth forehead with very little movement. Others prefer a softer effect that still allows natural expression. A lighter look means fewer units.
Why the Forehead Is Rarely Treated Alone
The frontalis is the only muscle in your forehead that lifts your eyebrows. The muscles around the glabella (the frown area) pull your brows down. If you relax the frontalis without also treating the frown muscles, the downward-pulling muscles go unopposed and your brows can drop, making your eyes look heavy or hooded. This is why nearly every experienced injector treats both areas together, balancing the lifting and lowering forces so your brow position stays natural.
Placement matters as much as dosage here. Injecting too close to the eyebrows or too deep increases the chance that the product migrates toward the muscles that control the upper eyelid. Staying at least two finger-widths above the brow bone and injecting superficially into the frontalis helps keep the effect where it belongs.
What to Expect After Treatment
Dysport tends to kick in faster than some other neurotoxins. Most people notice the muscles starting to relax within two to three days, though it can take up to a full week for the final result to settle in. Once it does, the smooth effect typically lasts three to five months before the muscles gradually regain their full movement and lines begin to reappear.
Touch-ups or follow-up appointments are common, especially for first-timers. If your forehead still has noticeable movement after a week, your provider may add a few extra units at a follow-up visit rather than overdoing it from the start. This conservative approach is actually the safest way to find your ideal dose, because it’s easy to add more product but impossible to remove it once injected.
Typical Total for the Upper Face
Putting it all together, here’s what a full upper-face Dysport treatment commonly looks like:
- Forehead (frontalis): 20 to 40 units for women, 30 to 50 for men
- Frown lines (glabella): 50 to 70 units for women, 60 to 80 for men
- Combined upper face total: roughly 70 to 120 units, depending on anatomy and goals
These ranges are starting points. Your injector should evaluate your facial anatomy in person, watch how your muscles move when you make expressions, and tailor the dose to you rather than applying a one-size-fits-all formula. The “right” number of units is the one that gives you the look you want while keeping your face balanced and your brows in a natural position.