What are neuromodulators?

Dynamic wrinkles caused by repeated muscle movement — forehead lines, crow's feet and frown lines (glabellar lines) are the most common areas. Some providers also use neuromodulators for a gummy smile or vertical neck bands.

It blocks nerve signals to the targeted muscles, which reduces the muscle contractions that create expression lines over time.

The muscle layer. It does not add volume or change skin texture.

Static wrinkles present at rest, volume loss, skin laxity, and skin texture or pigmentation. Those are typically addressed with other treatment categories such as fillers, biostimulators, or lasers and skincare.

Little to none. Some people experience temporary redness, swelling or bruising at the injection sites.

Results commonly last around three to four months, though this varies by individual, dose and product. Repeat treatment is needed to maintain results.

Anyone considering a non-surgical, temporary way to soften expression lines.

People who are pregnant or breastfeeding, have certain neuromuscular conditions, or have a known allergy to the product's ingredients. A qualified provider can confirm suitability based on your medical history.

Dermal fillers — a different job, since fillers add volume rather than relax muscle (see Botox vs filler) — and, within this category, comparisons between specific brands like Botox, Dysport and Xeomin.

How many units will I likely need, what results can I realistically expect, how soon results typically appear, and what happens if I'm not satisfied with the outcome.