How Botox treatment differs for men

Male faces differ in muscle mass, skin and brow shape. Why dosing and placement for men differ, which areas are common, and how results stay natural.

Same mechanism, different anatomy

Botulinum toxin works the same way in every face: it reduces the release of acetylcholine at the nerve endings and relaxes the treated muscle. What differs between men and women is the anatomy the product meets. On average, men have larger and stronger facial muscles, thicker skin with more sebaceous glands, a flatter and lower eyebrow, and a different distribution of fat and bone in the face. Reviews of male facial anatomy (for example Keaney and Alster, Dermatologic Surgery, 2013) conclude that these differences should shape both dose and placement.

What studies show about dosing

In a randomized, double-blind study of men with frown lines, Carruthers and Carruthers (Dermatologic Surgery, 2005) compared four doses of botulinum toxin type A. Higher doses produced a greater response and a longer duration than the lowest dose. The study supports a practical observation: a dose that works well for a woman with a fine frown muscle may be too low for a man with a strong one, and the effect then wears off sooner.

Higher is not automatically better, however. The right dose is the one that softens the line while keeping natural expression, and that is decided individually, not by gender alone. Why dose and muscle strength influence duration is explained in How long does Botox last?

The most common areas

Area	What is treated	Particular point for men
Frown lines	Vertical lines between the brows	Strong corrugator muscles often need higher doses
Forehead lines	Horizontal lines	Keep the brow straight and avoid lowering it
Crow’s feet	Lines at the outer eye	Keep a natural smile with some lines
Masseter	Jaw muscle, clenching and grinding	Contour change is not always wanted

Keeping a male face male

The most important difference is aesthetic. Female eyebrows typically have an arch that peaks toward the outer third; male eyebrows are usually flatter and sit lower on the brow bone. Injection patterns developed for female faces can lift the outer brow and create an arch that looks out of place on a man. Placement in the forehead is therefore adjusted to keep the brow straight. At the same time, treating the forehead too heavily can lower the brow and make the eyes look heavy, which is why dosing in this area is careful.

Many men also want to keep some lines. A few crow’s feet when smiling or a slight movement of the forehead are part of a natural expression. A good result looks rested and less strained.

Masseter: function before form

In men, the masseter is often treated because of clenching or grinding at night, with jaw tension and sometimes headaches. A reduction in muscle activity can also make the lower face slightly narrower over time. For women, this is often the aim; for men, a strong jawline may be part of how they want to look. That should be discussed openly before treatment. The Masseter article covers the mechanism in detail.

Practical points

A slightly larger number of units is common.
Short hair offers less cover for small marks on the forehead; they usually fade within 30 minutes.
Shaving over injection areas is best postponed until the next day.
Strength training and sauna are best skipped on the day of treatment.

Whether a treatment suits your face, and at what dose, is decided in a physician consultation. A first-time overview is in Your first Botox appointment.

References

Dressler D, Adib Saberi F. Botulinum toxin: mechanisms of action. Eur Neurol. 2005;53(1):3-9. PMID 15650306.
Keaney TC, Alster TS. Botulinum toxin in men: review of relevant anatomy and clinical trial data. Dermatol Surg. 2013;39(10):1434-1443. PMID 24090254.
Keaney TC. Aging in the Male Face: Intrinsic and Extrinsic Factors. Dermatol Surg. 2016;42(7):797-803. PMID 27196541.
Yanes DA, Keaney TC. Refining male injectables in aesthetics. Clin Dermatol. 2022;40(3):256-258. PMID 34838660.
Carruthers A, Carruthers J. Prospective, double-blind, randomized, parallel-group, dose-ranging study of botulinum toxin type A in men with glabellar rhytids. Dermatol Surg. 2005;31(10):1297-1303. PMID 16188182.
Jabbour SF, Awaida CJ, ElKhoury JS, et al. The Impact of Upper Face Botulinum Toxin Injections on Eyebrow Height and Forehead Lines: A Randomized Controlled Trial and an Algorithmic Approach to Forehead Injection. Plast Reconstr Surg. 2018;142(5):1212-1217. PMID 30102667.
Keaney TC, Anolik R, Braz A, et al. The Male Aesthetic Patient: Facial Anatomy, Concepts of Attractiveness, and Treatment Patterns. J Drugs Dermatol. 2018;17(1):19-28. PMID 29320584.
Chen Y, Tsai CH, Bae TH, et al. Effectiveness of Botulinum Toxin Injection on Bruxism: A Systematic Review and Meta-analysis of Randomized Controlled Trials. Aesthetic Plast Surg. 2023;47(2):775-790. PMID 36694050.
Park MY, Ahn KY, Jung DS. Botulinum toxin type A treatment for contouring of the lower face. Dermatol Surg. 2003;29(5):477-83; discussion 483. PMID 12752514.