Lumpy dermal filler: why it happens, does it go away on its own, and how is it treated?

Filler lumps in the first 1–2 weeks after injection are usually caused by swelling and gel that has not yet settled, and they generally ease gradually. If a lump is still clearly visible after 2 weeks, see a doctor. If a lump is red, hot and painful, or the skin turns pale or has a blotchy purple discoloration, or your vision becomes blurred, see a doctor immediately. BonBoz Clinic is located at 66–68 Võ Văn Tần, Xuân Hòa Ward (formerly District 3), Ho Chi Minh City. Its operating licences are 11113/HCM-GPHĐ (dermatology) and 10036/HCM-GPHĐ (aesthetic medicine), issued by the Ho Chi Minh City Department of Health. Dr. Bùi Thị Kim Kha, Specialist Level I physician (practising certificate 009784/ĐL-CCHN), personally examines and performs the injections. The clinic uses self-resorbing fillers (biodegradable HA filler, dissolvable with hyaluronidase, and CaHA when the doctor indicates it), no permanent fillers, and keeps hyaluronidase on hand.

Quick summary:

• "Lumpiness" is a description, not a diagnosis: the same palpable lump can be swelling, superficially placed gel, migrated gel, inflammation, infection or a delayed reaction.
• The timing of onset, and whether the lump is red, hot or painful, helps the doctor tell these apart.
• Lumps caused by HA filler can usually be treated with hyaluronidase, but only after a doctor has examined you and identified the correct cause.
• Do not squeeze, inject, apply medication or take antibiotics or corticosteroids on your own.
• Pale skin or blotchy purple discoloration with pain, or any change in vision after injection, is an emergency.

Emergency signs: when should you not wait to see whether the lump goes away on its own?

Before discussing ordinary lumps, the most dangerous filler complication must be ruled out: vascular occlusion, in which gel enters or compresses a blood vessel and the skin downstream is deprived of blood supply. This complication is rare, but it needs to be treated early. The medical literature describes these typical signs:

• Skin at or near the injection site turns pale, then becomes dark purplish-red and blotchy, in a net-like pattern.
• Pain that keeps increasing and is out of proportion to an ordinary injection.
• When you press lightly on the skin and release, the pink colour returns more slowly than in the neighbouring area.
• A few days later: blisters and vesicles appear, then the skin in that area peels.
• Blurred vision, loss of vision, eye pain, drooping eyelid, double vision, or weakness in the arms or legs or difficulty speaking: this is an emergency.

A review of vision loss cases caused by filler worldwide identified the highest-risk areas as the glabella (between the eyebrows), the nose, the nasolabial fold and the forehead; in most cases the vision loss was irreversible. If you have any of the signs above, call the place where you were injected right away, or go to the nearest medical facility, and do not wait overnight. If you have blurred vision, loss of vision, weakness in the arms or legs, or difficulty speaking, call 115 or go to a hospital emergency department immediately. With HA filler, the earlier hyaluronidase is used the better, and it must be administered by a doctor. BonBoz hotline: 0869 612 310 – 1900 5309.

Why does filler become lumpy after injection?

Review articles on filler complications divide post-injection lumps into several groups, which differ in cause and in how they are managed. Below are the most common groups, put in plain language:

1. Swelling and gel that has not yet settled (from the first few days to about 2 weeks). The needle causes minor trauma to the tissue, and HA gel also absorbs water. The injected area may feel bumpy, lumpy or uneven between the two sides. Reviews note that most post-injection reactions are mild and temporary; lumps caused by swelling usually decrease gradually within about 1–2 weeks, though this timeframe varies from person to person.

2. Gel placed too superficially or concentrated in one spot. The lump is soft or firm, not red and not painful, and is more visible when you smile or when light hits at an angle. In thin-skinned areas such as under the eyes, superficial gel can show a blue-grey tint through the skin (known as the Tyndall effect).

3. Gel moving away from its original position. This usually shows up after a few weeks to a few months, for example gel from the tear trough settling down onto the cheek, or lip gel migrating above the upper lip border.

4. Inflammation or infection. The lump is red, hot and painful, and may come with spreading swelling, pus or fever. It can appear early, within a few days, or later.

5. Delayed-onset nodules. Lumps appear after a few weeks to a few months. A retrospective study of nearly 4,700 injections of one volumizing HA gel recorded 23 people with delayed nodules (about 0.5%), with a median onset of about 4 months after injection; nearly 4 in 10 cases had a preceding immune trigger such as a flu-like illness. Another study of more than 1,000 people recorded a rate of about 1% with one product and none with other products of the same range.

6. Granulomas and non-HA fillers. These are rare and usually occur late. Pay particular attention if you have ever been injected with a substance of unknown origin: such substances cannot be dissolved with hyaluronidase.

How can you tell the different types of lumps after filler apart?

The table only helps you judge how concerned to be. A true classification requires an in-person examination by a doctor, because many of these groups present with overlapping features.

Will filler lumps go away on their own?

They can, but it depends on the group:

• Lumps caused by swelling in the first 1–2 weeks usually decrease gradually as the tissue recovers. Keep the injected area undisturbed and attend your follow-up appointment so the doctor can check it.
• Lumps caused by superficial, concentrated or migrated gel are real gel sitting in the wrong place. HA gel is eventually broken down by the body, but this can take many months, and imaging studies show that gel can persist longer than its visible effect. Waiting for it to "dissolve on its own" is often not the best option.
• Inflammatory lumps, infection and delayed nodules should not be left to wait. Delay may make them harder to treat.

A practical rule: if a lump is still clearly visible after about 2 weeks, or if from the start it is red, hot or increasingly painful, see a doctor and do not wait any longer.

Is a lump after temple filler a problem?

The temple has a thin layer of tissue in some places and many branches of blood vessels running through it, including the superficial temporal artery. A lump at the temple therefore needs to be read in two ways:

• A soft lump that is not painful and does not change skin colour, felt along the injection line: usually caused by gel placed superficially or not yet evenly spread. After the swelling phase, if it is still clearly bumpy when viewed from the side, the doctor may consider treating it with hyaluronidase.
• A lump with pale or purple skin, worsening headache, spreading pain or any change in vision: this must not be treated as an ordinary lump. It is a situation where you need to see a doctor immediately.

The 2025 consensus of 12 Brazilian dermatologists and plastic surgeons on treating the temple area emphasises the importance of anatomical knowledge and product selection, and notes that haematoma and nodules are complications that have been seen in this area.

Is a lump after cheek filler a problem?

The cheek (cheekbone, mid-cheek) is an area commonly injected with a firm gel for support. Lumps in the cheek after injection usually take these forms:

• Uneven bumpiness in the first 1–2 weeks: usually caused by swelling and gradually improves.
• A firm lump at one spot, not painful: gel that is concentrated or placed superficially, more visible when smiling. The doctor examines you to decide whether to monitor further or treat it.
• A lump in the part of the cheek near the nasolabial fold, with pale or purple skin or increasing pain: the nasolabial fold is an area where blood vessels connect up to the eye region; see a doctor immediately.

In short: a cheek lump that is not red, not painful and getting smaller is usually not a concern; a lump that is red, hot, painful, growing, or accompanied by skin colour change must be examined.

How does the doctor treat lumps after filler?

There is no single approach for every lump. A sensible process usually includes:

1. 1Taking a detailed injection history: what day, where, which product, how much, and what has previously been injected in this area.
2. 2Direct examination: looking, palpating and comparing both sides; using ultrasound when needed to see which layer the gel lies in. The literature on lip and perioral complications encourages the use of ultrasound to guide more precise management.
3. 3Treatment according to the exact cause, summarised in the points below.

• HA gel in the wrong place, bluish tint, clumping: the doctor may use hyaluronidase at an appropriate dose to dissolve that portion of gel. People who have ever had an allergy to bee stings should say so beforehand, because this is a factor linked to the risk of allergy to the enzyme.
• Inflammatory lumps, infection: treatment as recommended by your doctor; one review advises that for inflamed lumps, antibiotics should be considered before or together with hyaluronidase.
• Delayed nodules, granulomas: may require a combination of methods such as hyaluronidase and local anti-inflammatory medication, with repeated follow-up.
• Vascular occlusion: emergency treatment, with high-dose hyaluronidase as early as possible, together with supportive measures.

You do not need to remember drug names or doses. What to remember is correct diagnosis first, treatment second, and every step is carried out by a doctor at a medical facility.

What should you not do if you notice a lump after filler?

• Do not squeeze, press hard or massage vigorously to "spread" the lump, unless a doctor has examined you and given specific instructions for your case.
• Do not inject or cut it yourself, and do not ask anyone who is not a doctor to "inject to dissolve" it.
• Do not take antibiotics or corticosteroids on your own, and do not apply leaves or medications of unknown ingredients.
• Do not inject more filler to "fill in" and even it out before you know what the lump is.
• Do not wait overnight if you have the emergency signs described at the beginning of this article.

If you want to prevent this from the start, the article what to avoid after filler to prevent lumps gives first-week care guidance. To tell normal swelling from abnormal signs in the first few days, see also the article after filler: common swelling or warning signs.

What should you do if you got lumps after injection elsewhere?

Bring all the information you still have: injection date, product name (label, receipt, photo of the box), injected area and amount, and photos from before and after. If you do not remember which filler was used, say so honestly so that the doctor can consider the possibility that it is not HA. How long HA filler usually lasts in each area is summarised in the article how long does filler last. At BonBoz Clinic, the doctor examines you first and only then decides whether to use hyaluronidase; the cost of dissolving old filler is charged separately, see the page filler injection cost by area.

To understand more about gel types, firmness and why HA filler can be dissolved, see the page HA filler — dermal filler. If you are choosing a place for re-injection, the article where to get reputable filler injections in Ho Chi Minh City cross-checks facilities that hold licences. A suitable place for injection should have a doctor performing the procedure, products of clear origin, and hyaluronidase on hand to manage problems when needed.

Frequently asked questions

How long does it take for filler lumps to go away?

Lumps caused by swelling usually decrease gradually within about 1–2 weeks. Lumps caused by gel in the wrong place can persist for many months; if a lump is still clear after about 2 weeks, see a doctor so they can decide whether treatment is needed.

Are lumps after temple filler dangerous?

A soft lump that is not painful and does not change skin colour is usually caused by gel placed superficially or not yet evenly spread. If it comes with pale or purple skin, increasing pain, severe headache or any change in vision, these are signs that you need to see a doctor immediately.

Is a lump after cheek filler a problem?

A small lump that is not red, not painful and getting smaller within 1–2 weeks is usually not a concern. A lump that is red, hot, painful, growing or accompanied by skin colour change needs to be examined early.

Should I massage the filler lump myself to dissolve it?

You should not massage vigorously on your own before being examined. Only massage when a doctor has assessed you and given instructions specific to your case, because until you know what the lump is, you cannot know whether massage is appropriate; each type of lump needs to be managed differently.

Does dissolving filler make the lump disappear immediately?

For lumps caused by HA filler in the wrong place, hyaluronidase usually makes the lump clearly smaller, and in some cases another injection is needed after the doctor reassesses. This enzyme has no effect on non-HA fillers, so the doctor must identify the type of substance first.

How long after injection is a lump considered abnormal?

There is no absolute timeframe. A lump with redness, heat, pain, fever or skin colour change is abnormal at any point in time. A lump with no symptoms but still clear after about 2 weeks, or a new lump appearing after many weeks, should also be examined.

References

• Funt D, Pavicic T. Dermal fillers in aesthetics: an overview of adverse events and treatment approaches. Clin Cosmet Investig Dermatol, 2013.
• Signorini M, et al. Global Aesthetics Consensus: Avoidance and Management of Complications from Hyaluronic Acid Fillers. Plast Reconstr Surg, 2016.
• DeLorenzi C. Complications of injectable fillers, part 2: vascular complications. Aesthet Surg J, 2014.
• Beleznay K, et al. Avoiding and Treating Blindness From Fillers: A Review of the World Literature. Dermatol Surg, 2015.
• Beleznay K, et al. Delayed-onset nodules secondary to a smooth cohesive 20 mg/mL hyaluronic acid filler: cause and management. Dermatol Surg, 2015.
• Sadeghpour M, et al. Delayed-Onset Nodules to Differentially Crosslinked Hyaluronic Acids: Comparative Incidence and Risk Assessment. Dermatol Surg, 2019.
• Convery C, et al. Delayed-onset Nodules (DONs) and Considering their Treatment following use of Hyaluronic Acid (HA) Fillers. J Clin Aesthet Dermatol, 2021.
• Kroumpouzos G, Treacy P. Hyaluronidase for Dermal Filler Complications: Review of Applications and Dosage Recommendations. JMIR Dermatol, 2024.
• Murray G, et al. Guideline for the Safe Use of Hyaluronidase in Aesthetic Medicine, Including Modified High-dose Protocol. J Clin Aesthet Dermatol, 2021.
• Wang Y, et al. Complications of Periocular Dermal Fillers. Facial Plast Surg Clin North Am, 2021.
• Kroumpouzos G, et al. Complications of fillers in the lips and perioral area: Prevention, assessment, and management focusing on ultrasound guidance. J Plast Reconstr Aesthet Surg, 2023.
• Faria GEL, et al. Treatment of the Temples: Brazilian Consensus. Aesthetic Plast Surg, 2025.

This article was compiled by the BonBoz Clinic editorial team and cross-checked against the medical sources cited above; the content is for information only and does not replace an in-person examination and consultation with a doctor.