Is V-line chin surgery dangerous? Nerve injury risks you should know

📅 Updated 24/05/2026·🏷️ Chin & Jaw·✍️ Editorial team — Dr. Vo Thanh Sang

You dream of a slim, refined jawline, but every time you are about to book an appointment, one question holds you back: is V-line chin surgery dangerous, and could it cause lip numbness, a crooked mouth or permanent facial paralysis? This concern is entirely valid, because this is an operation on the facial and jaw bones, where important nerves run through. The article below will help you look honestly at the real risks, understand why they happen and what the surgeon does to reduce them, so that you can make a decision based on understanding rather than on vague fear.

What is V-line chin surgery and why are many people worried?

V-line chin surgery is an operation to reshape the bone of the chin area, and sometimes the jaw angle as well, in order to create a slimmer chin contour that is more balanced with the face. The surgeon approaches through an incision inside the mouth, so it usually leaves no external scar.

Because it is a direct intervention on the bone structure, it is understandable that many people feel anxious. The surgical area lies close to the nerves that govern sensation and movement of the lips and chin. This is also why the procedure must be performed in a hospital setting, not at a spa or an aesthetic facility that lacks adequate conditions.

A short answer to the question of whether V-line chin surgery is dangerous: this is not a risk-free procedure, but when it is performed for the right indication, by a specialist surgeon, in a properly equipped facility, the level of safety can be controlled. Risks do exist, yet most of them can be prevented and managed.

The nerves that may be affected

To understand the risks clearly, it helps to know about two important nerves located within the surgical area:

The inferior alveolar nerve: it runs within the canal of the lower jaw and supplies sensation to the lower teeth, the lower lip and the chin. Its terminal branch exits at the mental foramen, very close to the area where the surgeon works.
The marginal mandibular branch of the facial nerve: it controls the muscles of the lower lip. Injury to this branch can cause muscle weakness, leading to a temporarily asymmetrical smile.

Most cases of numbness after surgery involve the sensory branch and are usually temporary. Injury affecting movement is less common, but it deserves attention.

Is V-line chin surgery dangerous when it comes to lip and chin numbness?

A sensation of numbness or tingling in the lower lip and chin is a common reaction in the first few weeks after surgery. It is usually caused by tissue swelling that temporarily presses on the sensory nerve, or by traction during the process of exposing the bone.

So is V-line chin surgery dangerous in this respect? The reassuring point is that most numbness gradually recovers as the tissue heals and the swelling subsides. Recovery of sensation can take from a few weeks to a few months, depending on each person's constitution and the extent of the procedure.

However, a small proportion of patients may experience prolonged sensory disturbance or persistent numbness if the nerve has been more significantly injured. This is why precise surgical planning and careful technique play a decisive role.

What does the surgeon do to reduce the risk of nerve injury?

The safety of a V-line chin operation depends greatly on preparation and technique. Factors that help reduce risk include:

Pre-operative imaging assessment: X-ray or CT imaging helps the surgeon accurately locate the nerve canal and the mental foramen, and then plan a bone-cutting line that stays well away from the danger zone.
Individualized planning: every face has a different bone structure and nerve position, so the plan must be based on each person's actual anatomy.
Careful dissection technique: exposing and protecting the nerve branches throughout the operation, while limiting excessive traction.
Bleeding control and asepsis: reducing the risk of hematoma and infection, which can indirectly affect the nerve.
Anesthesia and monitoring by a hospital team: ensuring overall safety during and after surgery.

The human and environmental factors are therefore just as important as the technique. A surgeon specialized in plastic and aesthetic surgery, working in a licensed surgical facility with adequate equipment and an anesthesia team, will control risk far better than places that lack the proper conditions.

Medical notes: contraindications, risks and complications

To be honest with you, V-line chin surgery is not suitable for everyone, and there are always certain risks involved.

Some cases that require careful consideration or are contraindicated

People with uncontrolled systemic conditions (cardiovascular disease, diabetes, blood clotting disorders).
People with an ongoing infection in the mouth or facial area.
Women who are pregnant or breastfeeding.
People with unrealistic expectations, or whose bone structure does not truly require intervention.
People below the age at which the jawbone is fully developed need to be carefully assessed.

Possible risks and complications

Numbness or sensory disturbance of the lip and chin, usually temporary and rarely prolonged.
Weakness of the lower lip muscles causing an asymmetrical smile, usually recovering over time.
Swelling, bruising and hematoma after surgery.
Infection of the incision inside the mouth.
Bleeding, an asymmetrical result between the two sides, or the need for revision surgery.
Risks related to anesthesia.

Results and the degree of recovery depend on each person's constitution and cannot be guaranteed to be identical. No surgery is absolutely safe; what matters is that the risks are well understood, prevented and managed promptly. Following the post-operative care instructions, attending follow-up appointments on schedule and reporting any abnormal signs immediately significantly reduce the risk.

How can the operation be made safer?

You can actively contribute to your own safety through the following steps:

Honestly declare your full medical history, the medications you are taking and any allergies.
Choose a specialist surgeon and a licensed surgical facility with an anesthesia team.
Ask for imaging to assess the bone and nerves before surgery.
Discuss frankly your expectations and what the technique can and cannot achieve.
Strictly follow the instructions on diet, hygiene and follow-up after surgery.

A direct in-person consultation is irreplaceable. Only by assessing your facial structure, health status and wishes on site can the surgeon advise whether this method is suitable for you and what the actual level of risk is.

Conclusion

So, is V-line chin surgery dangerous? The honest answer is: there are risks, particularly involving the sensory nerves of the lip and chin, but most of them can be prevented and controlled when the procedure is performed for the right indication by a specialist surgeon in a properly equipped hospital. Understanding the risks clearly is the very first step toward feeling more confident about your decision.

If you still have concerns and would like a specific assessment of your own case, please book a consultation with Dr. Vo Thanh Sang for thorough and transparent advice. Contact the hotline 079 7479 222 for support with scheduling and to have your questions answered.