Choose Botox if your main concern is lines that appear when you move — frown lines, forehead creases, or crow’s feet — because Botox relaxes the muscles that create them. Choose dermal filler if your concern is volume loss or lines that are there at rest — hollow cheeks, thin lips, under-eye hollows, or deep smile folds — because filler physically adds volume. Many people combine both. A quick test: relax your face in the mirror. Lines that vanish at rest are usually Botox territory; lines and hollows still visible when relaxed are usually filler territory. A consultation confirms the right approach for your face.
The core difference
These two treatments are often confused, but they do opposite jobs. Botox is a neuromodulator that temporarily relaxes a muscle so it stops creasing the skin above it. Filler is a gel — usually hyaluronic acid — that adds volume under the skin to lift, plump, or smooth. One quiets movement; the other restores structure.
Botox vs filler at a glance
| Botox | Dermal Filler | |
|---|---|---|
| What it is | Neuromodulator that relaxes muscle | Gel (usually hyaluronic acid) that adds volume |
| Best for | Dynamic lines from movement | Volume loss and static lines |
| Common areas | Forehead, frown lines, crow's feet | Cheeks, lips, under-eyes, smile lines |
| Onset | 3–14 days | Immediate |
| Typical duration | 3–4 months | 6–18 months |
| Typical cost (BlushLocal estimate) | ~$615 per session | ~$1,520 |
| Reversible? | No — it wears off | Often (HA fillers dissolve with hyaluronidase) |
The mirror test
Sit in front of a mirror and let your face go completely neutral. Lines that disappear when you stop moving (the forehead crease that only shows when you raise your brows) respond to Botox. Lines and hollows still visible at rest (flattened cheeks, deep folds from the nose to the mouth, thin lips) are filler’s job. This one check resolves most of the confusion.
When you need both
Plenty of treatment plans use the two together — for example, Botox to soften frown lines and a small amount of filler to restore cheek volume. Because they work differently, they complement rather than replace each other. A good injector will tell you honestly if one alone will meet your goal.
Cost and longevity
Filler usually costs more per treatment but lasts longer, while Botox is less per session but needs refreshing a few times a year. Figures above are BlushLocal cost-guide estimates; see the Botox cost guide and dermal filler cost guide for ranges by state and metro. Want a deeper dive on how the two products differ chemically and clinically? Read our full dermal fillers vs Botox guide.
Where people confuse the two
The classic mix-up is the lines from the nose to the mouth (nasolabial folds) and marionette lines. Because they look like "wrinkles," people assume Botox — but they are usually caused by volume loss and descent, which is filler territory. Similarly, thin lips and flat cheeks are volume problems, not movement problems. Meanwhile, forehead and frown lines that deepen when you emote are movement problems that filler cannot fix well on its own.
Can you get both in one visit?
Often, yes — many people have Botox and filler at the same appointment, targeting different concerns. Your provider will sequence them appropriately. Combining them is common in a full "refresh" plan and can look very natural when doses are conservative.
Safety and side effects
Both are well-established when performed by qualified injectors. Botox’s common side effects are temporary: minor bruising, a short-lived headache, or (rarely) a droop from product migration. Filler carries its own considerations — swelling, bruising, and, rarely, vascular complications — which is a strong reason to choose an experienced medical injector for filler in particular. In both cases, provider skill is your best safety feature.
Quick answers
Which is better for forehead wrinkles?
Botox, because forehead lines come from muscle movement.
Which lasts longer, Botox or filler?
Filler (6 to 18 months) typically outlasts Botox (3 to 4 months).
Can filler be reversed?
Hyaluronic-acid fillers can be dissolved with hyaluronidase; Botox simply wears off.
Keep reading
- Botox vs Dysport: Differences, Cost & How to Choose
- Dermal filler cost by state & metro
- Botox cost by state & metro
This guide is general education, not medical advice. Botox and Dysport are prescription treatments, and individual results, dosing, and suitability vary. Always consult a licensed medical provider (a physician, nurse practitioner, physician assistant, or a registered nurse working under medical supervision) before any treatment.