What is smile line filler injection? Advantages, disadvantages, costs, and notes
Have you ever felt insecure because of the deep wrinkles in your smile lines that make your face look older? Nowadays, smile line injections are a popular solution for many women to regain a youthful appearance in a short time. So what is special about the filler injection method for smile lines, what are the costs, and what should be noted to achieve the best results? Let’s explore in the following article.
1. What are smile line filler injections?
Smile line filler injections are a non-surgical cosmetic method that injects fillers into the area of the nose-cheek or cheekbone, creating a lifting effect in the mid-face and helping this area of skin to be fuller. At the same time, this method also helps to blur the nasolabial folds, giving a youthful appearance, erasing the traces of time, and making the skin firmer and more elastic.
Some types of fillers commonly used for smile line injections include:
- Hyaluronic Acid (HA): The most popular filler, helps provide moisture and improve skin elasticity. HA also has the ability to retain water, giving the skin a smooth and plump appearance.
- Calcium Hydroxylapatite (CaHA): A denser type of filler, helps fill deep wrinkles, enhancing firmness and long-lasting durability.
- Polylactic Acid (PLA): This fillerhelps increase collagen production in the skin, improves skin structure, and provides long-lasting effects. PLA is suitable for cases that require filling deep wrinkle areas on the face.
- Polymethyl Methacrylate (PMMA): PMMA is a semi-permanent filler that helps fill in deeply sunken areas of skin, including smile lines. However, due to its sustainable properties, PMMA must be injected by an experienced doctor to avoid complications and needs to be tested on the skin one month prior.

2. Advantages and disadvantages of smile line injection
Injecting smile line fillers is a cosmetic method chosen by many people due to its speed, effectiveness, and minimal invasiveness. However, like any beauty method, filler injections also have advantages and disadvantages that need to be considered before deciding to perform, specifically:
2.1. Advantages
Injecting smile lines will bring benefits such as:
- Quickly fill smile lines: Filler injections help quickly fill deep smile lines, after injection you will see the skin area plumpyounger, smoother.
- Painless, no long recovery needed: With the support of anesthetics, the filler injection process is gentle, causes little pain, and does not require a long recovery time, allowing the person to resume normal activities immediately afterward.
- Safe and few complications: Laugh line filler injections are a non-invasive method, minimizing the risk of complications and can be performed quickly at reputable cosmetic facilities.
- Instant results: Just after one injection session, you will see noticeable results without having to wait long, with skin appearing plump and radiant.
2.2. Disadvantages
Although filler injections offer many benefits, it cannot be denied that this method also has some disadvantages that need to be noted, such as:
- Temporary results: The results from laugh line injections last only from 1 to 2 years depending on the type of filler used. This means you will need to inject again to maintain the effect.
- High cost: Compared to other beauty methods, the cost of laugh line filler injections can be relatively high, especially when using high-end fillers.
- Possible complications:Side effects: Although rare, some people may experience side effects such as swelling, bruising, or allergies after injection, especially when performed at untrustworthy facilities.

3. Who should and should not inject smile lines?
Injecting filler in smile lines is an effective cosmetic method, but not everyone is suitable. Below are those who should and should not undergo smile line injection:
3.1. Suitable candidates
Those suitable for smile line filler injections are:
- People aged 22 and above.
- People with deep and clear smile lines.
- People with mild to moderate aging skin.
- People who want to improve their appearance without surgery.
3.2. Unsuitable candidates
Injecting smile lines is not suitable for cases after:
- Pregnant or breastfeeding.
- Allergic to any ingredients in the filler.
- People with serious dermatological conditions.
- Having a bleeding disorder.
- Currently suffering from systemic infections or at the injection site such as dental abscess, pulmonary tuberculosis,…
- People with a weakened immune system or undergoing treatment for illness.
4. Smile line injection procedure
The smile line filler injection procedure needs to be carried out carefully, accurately, and to medical standards with the following steps:
- Step 1: The doctor assesses the condition of the wrinkles and identifies the injection points to fill the smile lines, then marks the injection sites.
- Step 2: Clean the injection area and apply local anesthesia to reduce pain.
- Step 3: The doctor proceeds to inject the filler into the marked positions.
- Step 4: The doctor cleans the injection area, provides home care instructions, and monitors signs after the injection.

5. How much does smile line injection cost?
The cost of smile line injection depends on the beauty facility, the condition of each person’s smile line, and the type of filler used. For example, if the smile line is deeper, more filler volume will be needed, thus the cost will be higher. Accordingly, each injection will cost from 3 – 10 million VND.
6. Notes before and after smile line injection
To ensure effectiveness and avoid unwanted complications, before and after smile line filler injection, you need to pay attention to the following:
6.1. Before injection
Notes before smile line injection:
- Choose a reputable address with experienced doctors and full professional certificates to ensure quality and safety.
- Consult with the doctor about the appropriate method and treatment regimen.

In addition to smile line injection, if you have wrinkles around the eye area such as on the forehead, frowning,… then the wrinkle removal injection method can also help improve this condition.
At Dr. Eye clinic, the eye wrinkle removal injection service has become a favorite choice for many women thanks to its natural effectiveness, long-lasting maintenance without causing swelling or bruising after injection. Especially, with a team of experienced doctors and full professional certifications, Dr. Eye is committed to providing a personalized wrinkle removal injection regimen for each customer, using 100% FDA-approved genuine injection drugs, ensuring absolute safety and optimal results.
Not only that, women can rest assured because the wrinkle removal injection process at the clinic meets medical standards, adhering to strict sterile conditions. After the regimen, the doctor also provides thorough guidance on home care, helping women maintain youthful, smooth skin for a long time.

In addition, when experiencing the services of Dr. Eye – the first center specializing in anti-aging around the eyes, women also receive 5-star standard care benefits such as: Scheduling surgery as requested (24 hours in advance), free health check & pre-surgery tests, receiving a special medication package after the service (antibiotics, anti-inflammatory, swelling reduction), a specialized eye compress bag, having a recovery room before and after surgery,…
No more signs of aging making women feel insecure, contact Dr. Eye now to get advice from a cosmetic specialist on effective and safe wrinkle removal injection solutions!
Request a callback for consultation
7. Frequently Asked Questions
Besides questions like what is smile line filler injection or how much is smile line injection, many beautiful women also have concerns such as:
7.1. How many cc should be injected for smile lines?
The dosage of filler injected into the smile lines is adjusteddepending on the skin condition and facial features of each customer. Typically, the amount of filler ranges from 1 – 2 cc, and can go up to 3 cc if needed to fill deep smile lines to help the face look younger.
7.2. How long does it take for smile line injections to look good?
After injecting smile line filler, the injection area needs 24 – 48 hours to stabilize, however, the time may vary depending on each person’s constitution. In some cases, it may take up to 1 week for the filler to stabilize completely and look better.
7.3. How long does the effect of smile line filler last?
Injecting filler for smile lines usually maintains effectiveness from 12 – 24 months, depending on the type of filler used, individual constitution, and personal care methods. With good care and a balanced lifestyle, the duration can be extended longer.

7.4. What to do if smile line injections feel stiff?
The stiffness after smile line filler injections often occurs because the filler needs time to integrate with the surrounding tissues. However, if this condition persists or does not improve after a few days to a week, you should contact a doctor for timely examination and treatment.
In general, smile line filler injection is a safe and effective cosmetic method that helps fill in wrinkles, providing smoother, younger-looking skin. However, to achieve the best results and minimize risks, you need to choose a reputable facility with qualified doctors and follow the proper post-injection care procedures. Don’t hesitate to consult a doctor to make a decision that suits your needs and condition!
References
- Nasolabial Folds (Smile Lines). 18/05/2022. https://my.clevelandclinic.org/health/diseases/23027-nasolabial-folds (accessed 10/01/2025
- The Pros and Cons of Dermal Fillers for Smile Lines & Other Non Surgical Alternatives. 05/07/2023. https://cityskinclinic.com/dermal-fillers-for-smile-lines/ (accessed 10/01/2025)
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