Muscle-relaxing injections or fillers: what differs
Muscle-relaxing injections and dermal fillers are different treatments. Learn how they differ in general and what to ask before you choose either one.
Thomas Lefèvre3 min read
Verdict: no winner. These two are often sold side by side, but they are different treatments for different goals, with different risks. In general terms, a muscle-relaxing injection is aimed at muscle activity, and a filler is a gel-like substance placed under the skin to add volume. Neither is something you can choose from a menu. A licensed professional should assess you and explain what each would involve for your own face. This is general information, not medical advice.
Which wins on
| Factor | Muscle-relaxing injections | Dermal fillers |
|---|---|---|
| What they do, in general | Temporarily reduce muscle movement | Add volume or fill under the skin |
| Where they are placed | Into muscles | Under the skin |
| Duration | Temporary, ask what is typical | Temporary, ask what is typical |
| Needs a prescription? | Often a prescription medicine, ask who prescribes | Rules vary, ask your clinic |
| Who should do it | A trained, licensed professional | A trained, licensed professional |
| Common question to ask | What happens if I do not like it? | What is the product and can it be reversed? |
Treat the "duration" and "reversible" lines as questions for your own clinic. They depend on the product and the person.

Questions to ask for either one
- Who is assessing me and who is injecting? What are their licences?
- What product is it, what is it called and where does it come from?
- Why do you suggest this and not the other?
- What are the common side effects and what are the rare serious ones?
- What aftercare do I need?
- What happens if I am unhappy, and is any correction in the quote?
The NHS says to ask about the products used and what could go wrong, and to take time to decide. See dermal fillers: what to ask for a longer list.
Pick a conversation about muscle-relaxing injections if
- A licensed professional has examined you and explained what these would do and not do.
- You have asked about side effects and aftercare, and you have the answers in writing.
Pick a conversation about fillers if
- You have been assessed, shown a clear plan and told what product would be used.
- You understand what happens if the result is not what you wanted.
Rule: a good consultation explains both, and the reasons for or against each. Be wary of anyone who only offers one option, or who says one is always better.
Caution
Both are medical procedures with risks. The NHS lists group treatments, vouchers on discount sites, mobile services and practitioners who advertise only on social media among the things to avoid. Seek urgent care for severe pain, vision changes, breathing difficulty, skin colour change or if you feel very unwell after any injection. The question of who should be injecting you comes first.
Quick questions
Is one gentler than the other?
Do not assume so. Both are procedures with risks. Ask your clinic what to expect for you.
Can I have both at once?
That is a question for the licensed professional who assesses you.
How do I know which is right for me?
You cannot know from a website. A consultation with a licensed professional, and the written plan from it, is how you find out.
Where can I start checking clinics?
Use our licence routine and the clinic directory.
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