Complications Around the Mouth: What a Specialist Review Covers

A 2019 review by a facial plastic surgeon looked at the complications that can follow injectable treatments around the mouth, lips and chin, and how clinicians can prevent and manage them. Its central message is that most problems are avoidable or treatable when the injector understands the local anatomy, chooses reversible products and acts quickly when warning signs appear. Serious complications are uncommon, but knowing what to watch for helps you get timely care.

Why this was studied

The area around the mouth is one of the most commonly treated regions of the face, for lip enhancement, smile lines, marionette lines and chin shape. It is also a busy area anatomically, with arteries running close to the surface, nerves exiting the bone and muscles that move constantly with speech and eating.

Dr. Ben Talei wrote this review for a specialist journal issue on the jawline and mouth area. It draws on published literature and his own clinical experience to describe what can go wrong, why and what to do about it.

What the review covers

The review is a broad clinical overview rather than a study with its own data. Key themes include:

• Product choice. Fillers range from temporary to permanent. The author considers hyaluronic acid filler the safest option around the mouth because it can be dissolved. He advises against permanent fillers in this area and against calcium hydroxylapatite or poly-L-lactic acid (PLLA) in the lips, because problems with these are harder to reverse.
• Blood vessel compromise. Filler can block or compress an artery or vein. The lip artery runs within the muscle layer, so placing filler in shallower layers is advised. Early signs of a blockage in the upper lip can be mistaken for bruising.
• Vision changes. Loss of vision is described as rare but possible with any injectable near connected vessels. It is treated as an emergency needing immediate referral to eye specialists.
• Nerve symptoms. Sudden, severe numbness near the nerve openings in the chin or under the eye may call for prompt dissolving of filler.
• Lumps, swelling and migration. These are more common, usually milder problems, and many can be managed patiently and conservatively.

What the review recommends

For prevention, the author stresses careful photographs before treatment, getting to know the patient's history, knowing where key vessels and nerves run, and avoiding areas where tissue is tight and leaves no room for product. He emphasises taking patient concerns seriously and examining them promptly.

For suspected blood vessel compromise, he describes an immediate, aggressive approach that centres on dissolving hyaluronic acid filler with the enzyme hyaluronidase, supported by other measures chosen by the treating physician. For milder issues such as slight asymmetry or swelling, he generally suggests waiting two to three weeks before deciding whether to intervene, because much settles on its own.

How strong is this evidence?

This is an expert narrative review. It is valuable for practical guidance and pulls together a wide range of published knowledge, but it does not present new trial data or measure how often complications happen. Some of the management steps it describes have limited supporting evidence, which the author acknowledges in places.

The author also declared financial relationships with companies that make injectable products. That does not mean the advice is wrong, but it is standard practice to note it. Since 2019, some guidance has evolved, so current consensus statements and local protocols should also inform care.

What it means for you

For most people, treatment around the mouth goes smoothly, with temporary swelling, tenderness or bruising. Still, it helps to know the signs that need attention straight away. Contact your clinic immediately, or seek emergency care if you cannot reach them, if you notice:

• Skin that turns pale, white, blotchy, purple or dusky, especially if it is spreading
• Pain that is increasing rather than easing
• Any change in vision, eye pain or drooping of the eyelid
• Sudden, strong numbness in the lip or chin
• Blisters, open sores or signs of infection in the treated area

Physician-led clinics keep emergency protocols and supplies for these situations. Our article on vascular occlusion safety explains how this is handled, and dissolving filler covers how hyaluronidase works.

Filler around the mouth is usually postponed during pregnancy, with an active cold sore or infection, or around dental work. If you have had previous filler of any type, mention it, because it can change how tissue responds.

How clinics prepare for the unexpected

Because serious complications are rare, the value of preparation can be easy to overlook. In practice, it means having hyaluronidase on hand, a written plan the whole team knows, clear after-hours contact details for patients and established links with local emergency and eye services. It also means reviewing photographs and medical history before each visit, since earlier treatments or surgery can change how tissue behaves. No treatment is without risk, but preparation shortens the time between a warning sign and the right response, which is often what matters most.

Questions to ask at your consultation

• Which product do you recommend for this area, and can it be dissolved if needed?
• What warning signs should I watch for, and how do I reach you after hours?
• Does your clinic keep hyaluronidase and an emergency plan on site?
• How might my previous treatments affect this one?

Frequently asked questions

Are complications around the mouth common?

Minor effects such as swelling and bruising are common and short-lived. Serious complications are uncommon. Knowing the warning signs simply means you can act early if one does occur.

Why does reversibility matter so much?

If a problem develops, hyaluronic acid filler can usually be broken down with an enzyme. Other filler types cannot be dissolved in the same way, which can make complications harder to correct.

Should I massage a lump myself?

Do not try to treat a lump on your own without advice. Contact your clinic so the area can be assessed and the right approach chosen.

If you are considering treatment around your lips or chin and want to understand the safety steps involved, HealthPark Medical Aesthetics in Sydney can walk you through them at a consultation.

Source

Talei B. Complications of injectables in the perioral region. Facial Plastic Surgery, 2019. Read the study