Injectable Myths Debunked — Separating Fact from Fiction About Botox and Fillers

Last updated: 5 March 2026

In an age of social media, influencer culture, and widespread misinformation, cosmetic injectables — particularly botulinum toxin (commonly known by the brand name Botox) and dermal fillers — are surrounded by persistent myths that can influence treatment decisions and create unnecessary anxiety. As practitioners who administer thousands of injectable treatments annually, we encounter these misconceptions daily.

This evidence-based guide addresses the most common myths about Botox and fillers, examining what the scientific literature actually tells us about their safety, efficacy, and long-term effects.

Myth 1: “Botox Is Toxic and Dangerous”

The Reality

Botulinum toxin is indeed one of the most potent biological substances known — its name alone can sound alarming. However, the doses used in aesthetic medicine are extraordinarily small: typically 20-60 units per treatment session, compared to the estimated lethal dose of approximately 2,500-3,000 units for a 70kg adult (Arnon et al., JAMA, 2001).

The safety record of cosmetic botulinum toxin is exceptional. A comprehensive review by Brin et al. published in Dermatologic Surgery (2009) analysed 36 years of clinical data (1977-2013) and concluded that botulinum toxin has “an established safety profile” with “a low rate of adverse events, most of which are mild and transient.”

Botulinum toxin has been approved for medical use since the 1980s (initially for strabismus) and for cosmetic use since 2002. It is one of the most extensively studied drugs in medicine, with over 3,000 published peer-reviewed articles documenting its safety and efficacy. The most recent safety analysis by Bertucci and Lynde in Clinical, Cosmetic and Investigational Dermatology (2022) confirmed that serious adverse events remain extremely rare.

“When patients express concern about the safety of botulinum toxin, I welcome the opportunity to discuss the evidence. Understanding the pharmacology — how the toxin works at the neuromuscular junction, how it is metabolised, and how the doses we use compare to those that could cause systemic effects — is deeply reassuring. This is one of the most well-studied aesthetic treatments in existence.” — Dr. Priya Chen, Axiom Aesthetics

Myth 2: “If I Stop Getting Botox, My Wrinkles Will Be Worse Than Before”

The Reality

This is categorically false. If you discontinue botulinum toxin treatment, your muscles will gradually return to full function over 3 to 6 months, and your wrinkles will return to their pre-treatment state. Your skin will not look worse than it would have if you had never been treated.

In fact, evidence suggests the opposite may be true. A study by Grimes and Hunt published in Dermatologic Surgery (2010) demonstrated that long-term botulinum toxin use can actually slow the progression of wrinkle formation. The mechanism is straightforward: repeated muscle relaxation reduces the repetitive folding of skin that causes dynamic lines to become static creases over time. Patients who have used botulinum toxin regularly for years may therefore have fewer deep wrinkles than they would have developed without treatment.

The perception that wrinkles are “worse” after stopping Botox is typically a contrast effect — patients have become accustomed to their smoother appearance and are now comparing their normal ageing skin to their treated baseline rather than to what it would have been without treatment.

Myth 3: “Botox Makes You Look Frozen and Expressionless”

The Reality

The “frozen” look is the result of poor technique or excessive dosing, not an inherent property of the treatment. Modern botulinum toxin practice has moved far beyond the early “freeze everything” approach of the 2000s.

Contemporary practitioners use precise, conservative dosing and advanced techniques to maintain natural facial expression while softening wrinkles. The “sprinkle” or “micro-Botox” technique, described by Wu in Plastic and Reconstructive Surgery (2015), uses smaller doses distributed across more injection points to achieve a natural, refreshed appearance that preserves full emotional expression.

A patient satisfaction study by Dayan et al. in the Journal of Cosmetic Dermatology (2019) found that 97% of patients treated with contemporary techniques reported maintaining natural facial expression, and 91% felt they looked “refreshed” rather than “treated.”

Myth 4: “Dermal Fillers Stretch Your Skin and Cause Sagging”

The Reality

This myth suggests that fillers physically stretch the skin, and that once they dissolve, the skin sags worse than before. The scientific evidence does not support this claim.

Hyaluronic acid fillers are gradually metabolised by the body, reducing in volume slowly over months. The skin contracts as filler volume diminishes, in the same way that skin adapts to gradual weight loss. Furthermore, research by Wang et al. in the Journal of Clinical Investigation (2014) demonstrated that HA fillers actually stimulate collagen production through mechanical stretching of fibroblasts. This means that even after the filler has been fully metabolised, the treated area may retain some structural benefit from newly produced collagen.

A long-term follow-up study by Narins et al. in Dermatologic Surgery (2013) tracking patients over 2 years after HA filler treatment found no evidence of accelerated skin ageing, sagging, or tissue atrophy after filler metabolism.

The caveat is chronic overfilling. Repeatedly injecting excessive volumes of filler over many years can, in theory, progressively distort facial proportions. This is an issue of practitioner judgement and restraint rather than a property of the filler itself.

Myth 5: “All Fillers Are the Same”

The Reality

This is a dangerous misconception. Dermal fillers vary enormously in their composition, rheological properties, intended use, and safety profile:

• Hyaluronic acid fillers (Juvederm, Restylane, Teosyal): Reversible with hyaluronidase. Multiple formulations for different areas. Excellent safety profile. The gold standard for most aesthetic applications.
• Calcium hydroxylapatite (Radiesse): A biostimulatory filler that provides immediate volume and stimulates collagen. Not reversible with hyaluronidase. Suitable for specific indications (jawline, hands).
• Poly-L-lactic acid (Sculptra): A collagen stimulator rather than a traditional filler. Does not provide immediate volume — results develop over weeks as collagen is produced. Not reversible.
• Polymethylmethacrylate (Bellafill): A permanent filler containing microspheres suspended in collagen. While long-lasting, its permanence means complications are also permanent. A review by Lemperle et al. in Aesthetic Plastic Surgery (2010) documented the risk profile of permanent fillers.

Beyond the type of filler, differences in cross-linking technology, HA concentration, and rheological properties (G’, cohesivity, viscosity) mean that even within the HA filler category, products behave very differently. A product designed for lip enhancement is entirely different from one formulated for cheek volumisation. Using the wrong product in the wrong area is a common cause of suboptimal results.

Myth 6: “You Can Get the Same Results From Cheaper Fillers at Beauty Salons”

The Reality

This myth carries genuine safety implications. The quality of an injectable treatment depends on three factors: the product used, the qualifications of the injector, and the clinical environment.

Product quality: Counterfeit and unregulated fillers are a documented problem. The MHRA (Medicines and Healthcare products Regulatory Agency) has issued multiple warnings about fake or substandard dermal fillers entering the UK market. A study by van Loghem et al. in Journal of Clinical and Aesthetic Dermatology (2015) found significant differences in purity, sterility, and composition between regulated and unregulated filler products.

Injector qualifications: In the UK, dermal fillers are currently classified as medical devices rather than prescription medicines, meaning non-medical practitioners can legally administer them. However, the complications of filler injection — particularly vascular occlusion — require immediate medical recognition and management. The Keogh Review (2013), commissioned by the Department of Health, recommended that dermal fillers should only be administered by trained healthcare professionals.

Clinical environment: A sterile clinical environment with emergency protocols, including stock of hyaluronidase for HA filler reversal, is essential for safe injectable treatment.

“The most important question a patient can ask before any injectable treatment is: ‘What happens if something goes wrong?’ A qualified medical practitioner in a clinical setting will have the training, the equipment, and the emergency protocols to manage complications immediately. This is not something that can be replicated in a beauty salon or at a house party.” — Dr. Priya Chen

Myth 7: “Botox and Fillers Are Only for Older People”

The Reality

The concept of prejuvenation — using aesthetic treatments preventatively in younger adults — is backed by scientific rationale. Dynamic wrinkles (those that appear during muscle movement) eventually become static wrinkles (visible at rest) through repeated mechanical folding of the skin. By treating dynamic lines before they become etched into the skin, botulinum toxin can prevent or delay this transition.

A prospective study by Schlessinger et al. in Aesthetic Surgery Journal (2017) following identical twins found that the twin who had received regular botulinum toxin treatment over 13 years showed significantly fewer static wrinkles than the untreated twin, providing compelling visual evidence of the preventative effect.

However, “preventative” does not mean “the earlier the better.” Treatment should be guided by clinical indication, not marketing pressure. At Axiom Aesthetics, we recommend preventative Botox only when dynamic lines are becoming visible at rest — typically in the late 20s to mid-30s — and only at conservative doses.

Myth 8: “Injectable Treatments Are Addictive”

The Reality

Botulinum toxin and dermal fillers have no pharmacological addictive properties. They do not affect brain chemistry, create dependence, or cause withdrawal symptoms. The confusion may arise from the psychological satisfaction of improved appearance, which motivates patients to maintain their results through regular treatments.

A study by Honigman et al. published in Plastic and Reconstructive Surgery (2004) examined the psychological outcomes of cosmetic procedures and found that the vast majority of patients reported improved quality of life and self-confidence — outcomes that naturally motivate continuation. This is no different from maintaining any positive health behaviour, such as regular exercise or dental hygiene.

That said, body dysmorphic disorder (BDD) — a condition in which individuals become excessively preoccupied with perceived flaws in their appearance — can drive excessive treatment-seeking behaviour. Ethical practitioners screen for BDD during consultations and may recommend psychological support rather than additional procedures in such cases. Research by Crerand et al. in Plastic and Reconstructive Surgery (2010) found BDD in approximately 7-15% of cosmetic surgery patients, highlighting the importance of thorough psychological assessment.

Myth 9: “Botox Migrates Around the Face”

The Reality

When injected correctly, botulinum toxin diffuses within a predictable, limited radius from the injection site — typically 1 to 3 cm depending on the formulation and dose. It does not “travel” through the bloodstream to affect distant muscles.

A diffusion study by Hexsel et al. in Dermatologic Surgery (2013) using anhidrotic response mapping demonstrated that the spread of botulinum toxin from the injection site is dose-dependent and predictable. The rare occurrence of unintended effects on adjacent muscles (such as temporary eyelid drooping after forehead treatment) is the result of local diffusion into nearby muscles, not systemic migration, and is almost always associated with improper injection technique or excessive dosing.

Patients can minimise the already-small risk of unintended diffusion by following aftercare instructions: remaining upright for 4 hours, avoiding rubbing the injection sites, and avoiding vigorous exercise for 24 hours.

Myth 10: “Once You Start, You Have to Keep Going Forever”

The Reality

There is absolutely no medical requirement to continue injectable treatments indefinitely. Both botulinum toxin and dermal fillers are temporary treatments that wear off naturally:

• Botulinum toxin: Effects last 3 to 6 months, after which muscle function returns completely.
• HA dermal fillers: Metabolised over 6 to 24 months depending on the product and location.

You can stop treatment at any time, and your face will gradually return to its natural appearance. There are no health consequences to discontinuing treatment. Many patients adjust their treatment frequency over time — some reduce to once or twice a year for maintenance, while others take breaks of several years.

The decision to continue or discontinue should always be the patient’s, made freely and without pressure.

The Importance of Evidence-Based Practice

In an era of social media aesthetics, it is more important than ever to seek treatment from qualified practitioners who base their approach on scientific evidence rather than trends. The British Association of Aesthetic Plastic Surgeons (BAAPS), the British College of Aesthetic Medicine (BCAM), and the Joint Council for Cosmetic Practitioners (JCCP) all provide guidelines for safe, evidence-based injectable practice.

At Axiom Aesthetics, every treatment recommendation is grounded in published peer-reviewed evidence, and we are committed to transparent, honest communication about both the benefits and limitations of every procedure we offer.

Frequently Asked Questions

How do I know if my practitioner is qualified?

Look for practitioners who are registered with a recognised medical body (GMC for doctors, NMC for nurses, GDC for dentists). Ask about their specific training in aesthetic medicine, the products they use (they should be able to name the exact brands), their emergency protocols, and their experience with complications. Reputable practitioners will welcome these questions. The Save Face register (www.saveface.co.uk) is a government-approved register of accredited practitioners in the UK.

Is it true that Botox can treat migraines and other medical conditions?

Yes. Botulinum toxin has over 20 licensed medical indications beyond cosmetics, including chronic migraine (NICE-approved since 2012), hyperhidrosis (excessive sweating), muscle spasticity, overactive bladder, and cervical dystonia. A landmark study by Dodick et al. in Headache (2010) — the PREEMPT trial — demonstrated that botulinum toxin reduced chronic migraine days by 50% in a significant proportion of patients.

What is the difference between Botox, Dysport, and Azzalure?

These are all brand names for botulinum toxin type A, produced by different manufacturers. Botox (onabotulinumtoxinA) is made by Allergan, Dysport/Azzalure (abobotulinumtoxinA) by Ipsen/Galderma, and Bocouture/Xeomin (incobotulinumtoxinA) by Merz. They differ slightly in molecular formulation, diffusion characteristics, and unit equivalency, but all achieve comparable clinical results when used by experienced practitioners. Your practitioner will select the product best suited to your treatment area and goals.

Can I have Botox and fillers at the same appointment?

Yes, this is common and safe practice. Many patients have botulinum toxin and dermal fillers administered in the same session. Your practitioner may recommend spacing certain treatments if treating the same area, to allow accurate assessment of each product’s effect. There are no safety concerns with combining these treatments.

How much do Botox and filler treatments cost in London?

In London, botulinum toxin treatment typically costs between £200 and £400 per area (e.g., forehead, frown lines, or crow’s feet). Dermal filler costs range from £300 to £600 per syringe (1ml), with most patients requiring 1 to 3 syringes depending on the treatment area. Be wary of prices significantly below these ranges, as they may indicate inexperienced injectors, diluted products, or non-genuine brands.