Lip Filler: Swelling, Side Effects, Aftercare and Questions for Your Doctor

What is lip filler

Lip filler is filler injected into the lips to add volume, which the US FDA lists as an approved use for certain products. [1][2] In Thai the same thing is called ฟิลเลอร์ปาก or ฉีดปาก.

The Thai FDA (อย.) lists the lips among the areas where filler is used and classes filler as a medical device. [7] The US FDA says having filler injected should be considered a medical procedure. [1] For the basics, read [[what-is-filler]].

Which fillers are approved for the lips

The FDA database lists several hyaluronic acid fillers approved for the lips, such as Juvéderm Ultra XC, Juvéderm Volbella XC and Restylane Kysse. [2] The database records Juvéderm Ultra XC as approved for the lips in 2015, Juvéderm Volbella XC in 2016 and Restylane Kysse in 2020. [2]

The recorded use is injection into the lips to add volume in adults over 21, and for Volbella XC and Kysse it also covers lines around the mouth. [2] Another example in the database is Revanesse Lips+, approved in 2020 for people aged 22 or older. [2]

A US approval does not tell you the Thai registration, and a product missing from this list is not unsafe because of that. This article did not check the Thai registration of any brand. Ask the doctor for the registration number and check it with อย. as the Thai FDA advises. [7] For brands, read [[filler-brands-compared]].

How long does lip filler swelling last

In a randomised trial of one hyaluronic acid lip filler, tenderness, swelling and lumps usually lasted no more than 7 days, but there is no single figure for everyone. [3] The symptoms that participants recorded most often in their diaries for the lips were tenderness, swelling and lumps or bumps. [3]

In the same trial, most treatment-related adverse events were mild and resolved on their own, with a median duration of about 2 weeks. [3] In the group that received the trial product, injection-site mass was reported in 10%, bruising in 8% and nodules in 5%. [3]

The FDA says more generally for all fillers that swelling and bruising start soon after injection and many clear in a few days to weeks. [1] The trial allowed ice packs to reduce swelling after injection. [3]

Read the figures with care. The trial tested one product and most participants had lighter skin tones. [3] The numbers cannot predict what happens to one person. This article does not give a do-and-don't list after injection, so follow what your injector tells you, and see [[filler-aftercare-lumps-duration]].

If symptoms get worse instead of better, or you have unusual pain, pale, gray or blue skin, or a change in vision, the FDA says to get medical help at once. [1]

What aftercare does lip filler need

The official sources I opened give no standard aftercare list, so follow your injector's written advice and know the warning signs. [1] The FDA filler page does not list things to avoid after the procedure. [1]

What the sources do give is the list of warning signs: unusual pain, vision changes, white, gray or blue skin near the injection, or signs of a stroke. [1] Treat these as a reason to get medical help at once, not as something to watch at home. [1]

For lumps and how long the effect lasts, read [[filler-aftercare-lumps-duration]].

What are the side effects and risks of lip filler

Besides swelling, bruising and pain, lip filler can cause lumps, infection and allergy, and the most serious risk is filler entering a blood vessel. [1][5] The FDA lists bruising, redness, swelling, pain, itching and rash as common, and nodules or granulomas, infection, open wounds, allergic reaction and tissue death as less common. [1]

The Thai FDA lists similar effects, such as itching, pain, swelling, tightness, redness and heat, bruising, infection, lumps at the injection site and skin that looks lighter or darker. [7] An expert consensus on hyaluronic acid fillers says early reactions include vascular compromise, inflammation and misplaced filler, and late ones include nodules, granulomas and skin discoloration. [5]

A 2024 systematic review focused on lips included 19 studies and analysed 30 patients with adverse reactions after lip filler. [4] The most common was a granulomatous foreign body reaction, which started on average about 58 months after injection, with a median of 24 months. [4]

The authors note that no study reported these reactions to a regulator and conclude that short- and long-term follow-up matters. [4] These are small case series, so they cannot say how often it happens, and they do not mean every lip filler leads to this.

The most serious risk is filler entering a blood vessel. The FDA says the chance is low, but the result can include tissue death, vision problems up to blindness, and stroke. [1] Warning signs are in [[what-is-filler]].

Can lip filler be dissolved

Hyaluronic acid lip filler can be dissolved with the enzyme hyaluronidase, which doctors use for overcorrection or complications. [4][6] The authors of the lip-filler review describe this reversibility as an advantage of hyaluronic acid over other fillers that are harder to correct. [4]

A clinical guideline says hyaluronidase is used to dissolve HA filler after vascular occlusion, for nodules that appear later, and for unsatisfactory results. [6] In the UK and the US this use is off-license, and patients should be told. [6]

The FDA warns that removing filler may need injections, surgery or other procedures, which carry their own risks. [1] Whether the lips return exactly to how they were before injection is not covered by the sources I opened, so this article does not answer it.

What to ask the doctor before lip filler

The FDA advises discussing the injection sites and risks and reading the patient labeling of the exact filler to be used. [1] The Thai FDA advises a clinic with a dermatology doctor, checking the product registration number, and photographing the product before the procedure. [7]

The FDA says to tell the doctor about skin inflammation or infection, a bleeding disorder, or allergy to lidocaine, collagen, eggs or animal products. [1] It says safety is unknown in pregnancy, breastfeeding and under age 22. [1]

The lip-filler trial above excluded people with frequent cold sore outbreaks on the lips. [3] If you get cold sores, tell the doctor. Questions to prepare:

• What is the product called, is the lip on its label, and what is its อย. registration number? [7]
• If swelling or lumps go beyond what you described, who do I contact, and when?
• If filler enters a blood vessel, what is the clinic's plan? [1]
• If the filler had to be removed, how would that be done, and what are the risks? [1][6]
• Do my allergies, cold sores, bleeding problems or pregnancy need to be mentioned first? [1][3]