I. V-LINE FACE – THE STANDARD OF MODERN BEAUTY
In recent years, the V-line face shape – a face with a slightly pointed chin, a slim jawline and soft facial features – has become a symbol of modern beauty, especially in Asian countries such as Korea, China and Vietnam. Unlike the traditional round face, the V-line creates a sense of elegance, lightness and luxury. The V-line face often creates a “photogenic” feeling, harmonizes with many makeup styles and hairstyles, and is also a prominent trend in the contemporary beauty industry.
Therefore, many people seek cosmetic interventions to improve the jaw angle, especially when the jaw muscles are overdeveloped, making the face square and stiff. Among the current methods, Botox injection in the jaw is considered the safest, most effective and least risky option for those who want to create a V-line face without surgery.
II. WHAT IS JAW BOTOX INJECTION? HOW DOES IT WORK EXACTLY?
Jaw Botox injection is a non-invasive cosmetic procedure that uses the active ingredient Botulinum Toxin Type A – a purified protein extracted from the bacteria Clostridium botulinum – to inject directly into the masseter muscle , the chewing muscle on both sides of the jaw. This is a large muscle located near the jaw angle and has the function of contracting during eating, talking and grinding teeth.
The mechanism of action of Botox is to temporarily inhibit the transmission of nerve impulses from the brain to the muscles , causing the muscle fibers in the injected area to relax and gradually lose their ability to contract . When the muscle is not active for a long time, its size will naturally shrink over time – a phenomenon called atrophy due to loss of movement . Thanks to that, the jaw area becomes slimmer, the angles are reduced and the entire face tends to be smaller, softer and more delicate.
One special point is that Botox has no ability to dissolve fat or affect the jawbone. It only affects the muscle – this means that this method is only effective if the cause of the large face is due to masseter muscle hypertrophy , not due to bone structure or fat accumulation. Therefore, the doctor needs to examine and analyze the facial structure carefully to give an accurate indication.
III. SUITABLE SUBJECTS FOR JAW BOTOX INJECTION – ANALYSIS OF EACH SPECIFIC CASE
Not everyone is suitable for jaw Botox injections, and not everyone with a square face will get the expected results if injected into the wrong subject. People who should really perform this method include:
1. People with large jaw muscles due to the habit of grinding teeth or chewing hard
This is the most common client group. The masseter muscle in this person can become enlarged over time due to excessive chewing activities – for example, constant gum chewing, teeth grinding while sleeping, or unconscious teeth grinding when stressed. These people often have a slightly enlarged jaw, and the face feels large and stiff, especially when smiling or tilting the head. Botox injections into the masseter muscle are very effective in softening facial expressions, and can also help improve jaw pain caused by teeth grinding.
2. People who want to improve their appearance but don’t want surgery
Not everyone is willing to take the risk of jaw surgery – which requires general anesthesia, a long recovery period and the risk of complications. Meanwhile, Botox injections to the jaw only take 10 – 15 minutes, require absolutely no recovery time, and give visible results after a few weeks. This is the ideal choice for those who want “smart beauty”.
3. People who are preparing for a special occasion
Many customers come to get Botox injections in the jaw before wedding photoshoots, TVC filming, important events or job interviews. The effect is clearly visible after 2-4 weeks and lasts from 6-9 months, very suitable for short-term cosmetic purposes.
IV. PROFESSIONAL JAW BOTOX INJECTION PROCESS – EVERY STEP AFFECTS THE FINAL RESULT
The Botox injection procedure for the jaw needs to be performed by a properly trained doctor, at a licensed medical facility or cosmetic facility. Below is the detailed procedure:
1. Examination & Assessment of facial structure
The doctor will check the masseter muscle area by asking the client to clench their teeth to determine the thickness and prominence of the muscle. From there, the doctor will assess whether the large face is due to muscle, bone or fat. If the jaw muscle is the main cause, the doctor will recommend the appropriate dose of Botox, balancing the two sides of the face to ensure that the face is not asymmetrical after injection.
2. Cleaning – sterilization and anesthesia
The skin at the injection site is thoroughly cleaned with an antiseptic solution. Next, the injection site will be numbed with lidocaine cream for 15–20 minutes , helping to minimize pain or stinging during the injection.
3. Inject Botox directly into the masseter muscle
The doctor uses a special ultra-thin needle to inject Botox directly into the midpoint of the masseter muscle on both sides. The number of injections depends on each person’s physical condition – usually 3-5 injections on each side, with a total dose ranging from 25 to 50 units on each side.
4. Post-injection monitoring and care instructions
Patients will be monitored for approximately 15–30 minutes to check for immediate post-injection reactions. The doctor or nurse will then provide written and verbal instructions for home care to help prolong the effects and prevent risks such as muscle deviation, bruising or swelling.
V. CHANGES AFTER INJECTION – DETAILS BY WEEK
Botox injections do not give immediate results, but progress slowly in cycles:
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Week 1 : Muscles begin to relax slightly, face has not changed clearly.
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Week 2 – 3 : Jaw muscles significantly reduce in size, face becomes slimmer, facial features become softer.
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Week 4 onwards : Peak results, clear, balanced and natural V-line face.
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Month 5 – 6 : Begins to gradually decline, muscles can function again depending on the body.
👉 During the process, facial expressions remain completely normal, the customer’s face does not stiffen, and talking or eating is not affected.
VI. POST-INJECTION CARE – A SMALL STEP, BIG EFFECT
After jaw Botox injections, proper care is key to maintaining long-term results and preventing complications:
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Do not touch, rub, or massage the injection area for the first 3 days as this may cause the Botox to spread to unwanted areas.
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Avoid lying on your side or stomach for at least the first 6 hours after injection to prevent the Botox from moving from its original position.
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Do not use alcohol, tobacco, alcoholic beverages, or spicy foods for 3-5 days because it may cause side effects.
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Do not chew gum, grind your teeth, or perform activities that cause your jaw muscles to contract continuously during the first week after injection.
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Follow-up appointments are scheduled to check the muscle response and plan for repeat injections when needed.
