What Are Dermal Fillers? A Complete Guide to Types, Uses and Risks

Dermal fillers are injectable treatments used to restore facial volume, improve facial contours and soften certain lines and folds. They are commonly used in areas such as the lips, cheeks, chin and jawline.

Although dermal fillers are a popular non-surgical aesthetic treatment, it is important to understand that they are medical procedures and are not suitable for everyone. Different filler materials have different properties, treatment uses and potential risks.

If you are considering dermal filler treatment, understanding how fillers work, what they can achieve and what complications may occur can help you make a more informed decision.

In this guide, we explain the different types of dermal fillers, common treatment areas, the consultation and treatment process, possible side effects and important safety considerations.

What Are Dermal Fillers?

Dermal fillers are gel-like substances injected beneath the skin to add volume, improve facial contours or soften particular lines and folds.

They are commonly used to address changes associated with ageing, including volume loss and changes in facial structure. They can also be used to enhance certain facial features where appropriate.

Unlike anti-wrinkle injections, which work by temporarily relaxing targeted muscles, dermal fillers work by adding volume beneath the skin.

The results depend on several factors, including:

• The type of filler used.
• The treatment area.
• The amount of product required.
• Individual facial anatomy.
• The practitioner’s assessment and injection technique.

Most commonly used temporary fillers are gradually broken down by the body, although the duration varies depending on the material and treatment area.

What Are the Different Types of Dermal Fillers?

Dermal fillers are made from different materials. Each has its own characteristics and intended uses.

1. Hyaluronic Acid (HA) Fillers

Hyaluronic acid is a substance naturally present in the body, including the skin and connective tissues.

Hyaluronic acid fillers are widely used in aesthetic treatments because they can add volume and improve facial contours. Depending on the product, they may be used for:

• Lip enhancement.
• Cheek volume restoration.
• Chin definition.
• Jawline contouring.
• Softening certain facial folds.

Some hyaluronic acid fillers can be broken down using an enzyme called hyaluronidase when clinically appropriate. However, this does not mean that every complication can be easily or completely reversed.

2. Calcium Hydroxylapatite (CaHA) Fillers

Calcium hydroxylapatite is a mineral-based material found naturally in human bones.

CaHA fillers are generally used for deeper facial volume restoration and selected contouring treatments. Some formulations can also stimulate the body’s natural collagen production.

Their properties differ from hyaluronic acid fillers, and they cannot be dissolved using hyaluronidase.

3. Poly-L-Lactic Acid (PLLA) Fillers

Poly-L-lactic acid is a synthetic, biodegradable material used in certain injectable treatments.

Rather than simply providing immediate volume, PLLA works gradually by stimulating collagen production. Changes develop over time and may require multiple treatment sessions.

It is generally used for selected cases of facial volume loss rather than precise lip enhancement.

4. Polymethylmethacrylate (PMMA) Fillers

PMMA fillers contain small synthetic microspheres suspended in a gel carrier.

Unlike temporary fillers, PMMA is considered a permanent filler material. It is used in specific circumstances and requires careful patient selection.

Because the material is permanent, complications or unwanted results may be more difficult to manage. It is important to understand the long-term implications before considering this type of treatment.

Which Areas of the Face Can Be Treated With Dermal Fillers?

Dermal fillers may be used in different facial areas depending on the patient’s anatomy, treatment goals and suitability.

Lip Enhancement

Lip fillers are commonly used to improve lip definition, add volume and address differences in lip symmetry.

The amount of filler required depends on the natural shape of the lips and the result being considered.

Cheek Enhancement

Cheek fillers may be used to restore volume in areas where facial fullness has reduced.

Treatment planning considers the overall facial structure rather than focusing only on adding volume to the cheeks.

Chin Enhancement

Chin fillers can help improve chin projection and definition in selected patients.

The treatment may also be considered as part of an overall facial balancing approach.

Jawline Contouring

Jawline fillers are used to improve definition and create a more structured appearance.

The appropriate treatment depends on the patient’s existing jawline shape, facial proportions and individual expectations.

Nasolabial Folds

Nasolabial folds are the lines that extend from the sides of the nose towards the corners of the mouth.

Fillers may be considered in selected cases, following an assessment of the surrounding facial structures.

Under-Eye Area

Tear trough fillers may be considered for certain patients experiencing under-eye hollowness.

However, this is a technically demanding area with particular risks. Not everyone with under-eye concerns is suitable for filler treatment.

How Does the Dermal Filler Treatment Process Work?

Before undergoing treatment, patients should have a consultation and understand what the procedure involves.

The process generally includes the following stages.

Step 1: Initial Consultation

The practitioner discusses the patient’s concerns, medical history, previous aesthetic treatments and desired results.

A facial assessment helps determine whether dermal fillers are appropriate.

Step 2: Treatment Planning

If treatment is considered suitable, the practitioner discusses the proposed treatment area, type of filler, expected outcome and potential risks.

Patients should have the opportunity to ask questions and consider the available options before making a decision.

Step 3: Preparation

The treatment area is cleaned, and the practitioner prepares the skin for the procedure.

Depending on the product and treatment area, a local anaesthetic or numbing cream may be used.

Step 4: Filler Injection

The filler is injected into the planned area using an appropriate technique.

The method and injection depth depend on the product, facial anatomy and treatment objective.

Step 5: Aftercare and Follow-Up

Patients receive aftercare instructions explaining what to expect during recovery and which symptoms require medical attention.

A follow-up assessment may also be recommended depending on the treatment.

What Are the Benefits of Dermal Fillers?

Dermal fillers can offer several aesthetic benefits when used appropriately.

These may include:

• Restoring volume in selected facial areas.
• Improving lip definition and fullness.
• Enhancing chin and jawline contours.
• Softening certain facial folds.
• Supporting facial balance and proportion.
• Providing a non-surgical approach to selected aesthetic concerns.

However, results vary between individuals. Dermal fillers cannot address every concern associated with facial ageing, and they should not be presented as a replacement for surgical procedures where surgery is more appropriate.

What Can Go Wrong With Dermal Fillers?

Dermal fillers carry risks, even when administered by an experienced practitioner.

Some side effects are temporary, while others can require medical assessment and treatment.

Common Side Effects

The more common side effects include:

• Swelling around the injection site.
• Bruising.
• Redness.
• Tenderness.
• Temporary discomfort.
• Minor irregularities during the healing period.

These reactions often improve over time, although the recovery period varies depending on the treatment area and individual response.

Lumps and Uneven Results

Some patients may notice lumps, bumps or unevenness after treatment.

These can be related to swelling, filler placement, product characteristics or other tissue reactions. Persistent or worsening lumps should be assessed by an appropriately qualified medical professional.

Filler Migration

Filler migration refers to the movement of filler material away from its intended treatment location.

It may contribute to unwanted fullness, changes in facial contours or visible irregularities.

If migration is suspected, a professional assessment is important to determine the cause and appropriate management.

Infection and Delayed Inflammatory Reactions

Infection is a possible complication of injectable treatments.

Some patients may also experience inflammatory reactions around previously treated areas, sometimes appearing weeks or months after the original procedure.

Persistent redness, swelling, tenderness or new lumps should be assessed rather than treated through self-medication.

Vascular Occlusion

One of the most serious potential complications is vascular occlusion.

This occurs when filler blocks or restricts blood flow within a blood vessel. It can result in tissue damage and, in rare cases, visual impairment or blindness.

Warning signs may include:

• Severe or increasing pain.
• Unusual whitening or changes in skin colour.
• Dusky or bluish skin.
• Blistering or unusual skin changes.
• Any sudden change in vision.

These symptoms require immediate medical attention. Contact the treating clinician urgently and seek emergency medical care if there are visual symptoms or the clinician is unavailable. Do not wait for symptoms to settle on their own.

Who Should Consider Dermal Fillers?

Dermal fillers may be appropriate for adults who have specific aesthetic concerns and realistic expectations about treatment outcomes.

However, suitability must be assessed individually.

A practitioner should consider:

• Medical history.
• Existing skin or facial conditions.
• Previous filler treatments.
• Allergies and relevant sensitivities.
• Current medications.
• The proposed treatment area.
• Individual expectations and treatment goals.

A consultation is essential to determine whether treatment is suitable or whether an alternative approach would be more appropriate.

How Can You Reduce the Risks of Dermal Filler Treatment?

Choosing an appropriately qualified and experienced practitioner is an important part of making an informed decision.

Before proceeding, consider the following:

Check the Practitioner’s Qualifications

Ask about the practitioner’s medical qualifications, specific aesthetic training and experience with the proposed treatment.

Understand the Product Being Used

Ask for the name of the filler, its manufacturer and information about the product’s intended use.

Discuss Possible Complications

A responsible practitioner should explain common side effects, serious complications and how emergencies are managed.

Understand the Aftercare Process

Find out who to contact if you experience unexpected symptoms after treatment and whether follow-up appointments are included.

Take Time Before Making a Decision

Do not feel pressured into undergoing treatment. You should have enough time to understand the procedure, consider the risks and decide whether it is right for you.

Frequently Asked Questions About Dermal Fillers

1. How long do dermal fillers last?

The duration depends on the filler material, treatment area, product characteristics and individual factors. Some temporary fillers last several months, while others may last longer.

Read our detailed guide on how long dermal fillers last.

2. Are dermal fillers permanent?

Most commonly used temporary fillers are gradually broken down by the body. However, some filler materials, such as PMMA, are permanent and may remain in the treated area long term.

3. Are dermal fillers painful?

Patients may experience some discomfort during injection. The level of discomfort depends on the treatment area, technique and product used. Anaesthetic options may be available.

4. Can dermal fillers be dissolved?

Some hyaluronic acid fillers can be dissolved using hyaluronidase when medically appropriate. Other materials, including calcium hydroxylapatite and PMMA, cannot be dissolved using this enzyme.

5. What is the difference between dermal fillers and Botox?

Dermal fillers add volume beneath the skin, while Botox and other botulinum toxin treatments temporarily relax targeted muscles.

Read our separate guide on Botox vs dermal fillers.

6. Can dermal fillers cause complications?

Yes. Possible complications include swelling, bruising, infection, lumps, inflammatory reactions and vascular occlusion. Some complications can be serious and require urgent medical treatment.

7. What should I do if I suspect filler migration?

Arrange an assessment with a qualified medical professional experienced in filler complications. Avoid massaging or attempting to correct the area yourself without professional advice.

Considering Dermal Filler Treatment?

Understanding the available treatment options, possible outcomes and associated risks is an important part of making an informed decision.

At Dr Salim Aesthetic Medicine, consultations provide an opportunity to discuss individual concerns, assess treatment suitability and understand the options available.

If you are considering dermal filler treatment, contact the clinic to arrange a consultation and discuss your requirements.

Medical information note: This article provides general educational information and does not replace an individual medical consultation or diagnosis. Treatment suitability and complication management should always be assessed by an appropriately qualified healthcare professional.