What is a dermal filler and how does it work?
A dermal filler is a gel, most often made of cross-linked hyaluronic acid, that is placed beneath the skin to add volume or structural support. The effect is visible straight away and the gel is gradually broken down by the body.
Hyaluronic acid is a natural component of skin and connective tissue. In filler products, it is stabilised through a process called cross-linking so that it stays in the tissue for longer. Products differ in firmness, elasticity and how they spread within the tissue, which is known as their rheology. A product designed for the lips therefore behaves differently from one designed for the chin or cheeks, and the choice is made according to the area.
The aim of a filler is not to change your face but to rebalance support and proportions that have diminished with age or were structurally less pronounced. How long the effect lasts depends on how mobile the area is, the product used, the amount and your own metabolism. Because hyaluronic acid fillers break down over time, the appearance gradually returns towards its starting point, and a top-up can be considered if you wish.
Which areas can be treated with filler?
Fillers are most often used in the lips, chin, cheeks, tear troughs, jawline, temples and along the nasal bridge. Each area has its own anatomy, risk profile and suitable product type.
Typical goals include volume and definition in the lips, profile balance at the chin, mid-face support in the cheeks, softening the shadow of the tear trough, definition along the jawline, restoring hollow temples and subtle contour refinement of the nose. Some areas, particularly the nose, the under-eye region and the temples, are anatomically more sensitive because of their blood supply, and they call for additional experience and care.
Each area has its own page explaining what is realistically possible and what filler cannot achieve. It is often more balanced to look at the face as a whole rather than focusing on a single point. A tear-trough hollow, for example, may be linked to reduced support in the cheek. For this reason, the plan is shaped by the overall structure of your face rather than only by the area that concerns you most.
Who may not be suitable for fillers?
Fillers are usually avoided or postponed during pregnancy and breastfeeding, with an active infection in the treatment area, in some autoimmune conditions and with a known allergy to any ingredient. The final decision is made at your consultation.
If there is a cold sore, spot or other infection in the treatment area, treatment is usually postponed until it has healed. Blood-thinning medication, a tendency to bleed, recent dental work or a recent vaccination can also affect timing. If you have had fillers elsewhere and do not know which product was used, this information matters; in some cases imaging or a waiting period may be advised before further treatment is considered.
Realistic expectations are as important as medical suitability. Significant sagging, prominent under-eye bags or structural differences that would require surgery may not be corrected in the way you hope with filler alone. In such cases the doctor will explain the limits of filler clearly and, where appropriate, discuss other options. General information on this subject is also available on the suitability page in the safety section.
What happens during a filler treatment?
After assessment and planning, the skin is cleansed, a numbing cream may be applied, and the filler is placed at the chosen depth using a fine needle or a blunt cannula. Treatment usually takes 30–60 minutes.
The first step is an in-person consultation in which your facial structure, skin quality and expectations are assessed. You will be asked about your medical history, any medication and previous treatments. Once the plan is clear, the area is cleansed with antiseptic. Many filler products contain lidocaine, and a numbing cream can be applied as well. How much discomfort you feel varies from person to person and from one area to another.
Depending on the anatomy of the area, the filler is placed with a fine needle or a blunt-tipped cannula at the appropriate depth. Slow, controlled injection, small increments and close observation of how the tissue responds are all important throughout. The doctor assesses symmetry and proportion as the treatment progresses. Afterwards there is a short period of observation, and aftercare advice is explained before you leave.
What should I expect after filler treatment?
Mild swelling, redness and bruising are common in the first few days. Strenuous exercise, saunas, alcohol and pressure on the area should usually be avoided for the first 24–48 hours.
Swelling usually settles within a few days, although it can take a little longer in the lips and under the eyes. Cold compresses can help. Follow your doctor’s advice on make-up, massaging the area and sleeping face down. The final result is generally assessed after two to four weeks, once the filler has settled and the swelling has resolved, which is why a follow-up appointment is usually arranged.
Increasing pain, blanching of the skin, a mottled purple discolouration, any change in vision, or redness accompanied by fever are not part of normal healing. If you notice any of these, contact the doctor who treated you without delay. It is also useful to know in advance how to reach your doctor in the days after treatment. General advice on preparing for and recovering from treatment is covered separately in the safety section.
What are the risks of fillers and how are they managed?
Common side effects include temporary swelling, bruising and tenderness. Rarer but important risks include vascular occlusion, infection and delayed inflammatory reactions, which is why anatomical knowledge and preparation matter.
No injectable treatment is entirely free of risk. Filler entering a blood vessel, or compressing one from outside, can rarely disrupt blood flow to the tissue. The nose, under-eye area, temples and the area between the brows are particularly sensitive in this respect. Anatomical knowledge, choosing the right depth and instrument, slow injection and recognising warning signs early all work together to reduce this risk, although it cannot be removed completely.
An important feature of hyaluronic acid fillers is that they can be dissolved with an enzyme called hyaluronidase. Having this enzyme available where treatment takes place is a general safety measure that allows a prompt response if something unexpected occurs. Using an authentic, traceable product registered for use in Türkiye, and having treatment performed by an authorised doctor in a licensed healthcare facility, are also part of safe practice.
Frequently asked questions
What is the difference between filler and Botox?
Filler is a gel placed in the tissue to add volume and support. Botulinum toxin temporarily relaxes muscles to soften expression lines. They address different concerns and are sometimes planned together.
How long do dermal fillers last?
It depends on the area, the product, the amount used and your metabolism. For hyaluronic acid fillers, a typical range is often 6–18 months, and it may be shorter in mobile areas such as the lips.
Can filler be reversed?
Hyaluronic acid fillers can largely be dissolved with the enzyme hyaluronidase. This is used both for an unwanted result and in the event of a complication, and the decision is made by the doctor after examination.
I am visiting Istanbul for treatment. What should I plan for?
Allow time for an in-person consultation, possible swelling or bruising, and ideally a follow-up before you travel. Avoid scheduling treatment just before a flight or an important event, and keep a record of the product used.
Which filler brand will be used?
The product is chosen according to the needs of the area, the characteristics of your tissue and the doctor’s assessment. It is not accurate to rank brands in general; what matters is suitability, authenticity and correct technique.
Is there a right age to have filler?
There is no single ideal age for filler; the decision depends on what your face actually needs rather than on your age. In younger adults, filler is more often considered for structural proportions such as the lips, chin or nose, and later in life for restoring volume that has diminished. Cosmetic filler is generally considered only in adults whose facial growth is complete.
Can men have dermal filler?
Yes, men can have filler; in men it is most often used for the chin, jawline, cheeks and tear troughs. Men’s skin is usually thicker and their features more angular, and because the face is often larger, the amount of product needed may differ. The aim is usually not to soften the features but to create a natural contour that suits a masculine structure.
How soon can I go back to work after filler?
Most people return to desk-based work the same or next day; filler does not usually need a long recovery. Swelling and any bruising are usually most noticeable in the first two to three days. Around the lips and eyes, swelling or bruising can last a week or a little longer; with a physically demanding job, a day or two off may be more comfortable.
Can I have Botox and filler on the same day?
Yes, where appropriate, Botox and filler can be given in the same session, because they act on different tissues through different mechanisms. As Botox usually takes around two weeks to settle fully, the doctor may instead prefer to give Botox first and plan filler for a later session in areas where muscle movement affects how filler looks. The order depends on the areas being treated.
What affects the cost of filler?
The main factors are the type of product, the number of syringes needed, how many areas are treated and the time the treatment takes. Because the amount needed for the same area varies between people, reliable information can only be given once a plan is made at an in-person consultation. Whatever the cost, the product must be authentic, registered in Türkiye and traceable.
Sources (5)
- U.S. FDA: Dermal Fillers (Soft Tissue Fillers)
- American Academy of Dermatology: Fillers: FAQs
- American Society of Plastic Surgeons: Dermal Fillers
- Global Aesthetics Consensus Group (Plastic and Reconstructive Surgery): Global Aesthetics Consensus: Avoidance and Management of Complications from Hyaluronic Acid Fillers—Evidence- and Opinion-Based Review and Consensus Recommendations (2016)
- Medical Device Coordination Group (European Commission): MDCG 2023-5 Guidance on qualification and classification of Annex XVI products – A guide for manufacturers and notified bodies (2023)
This content is for general information and does not replace a personal medical assessment.