Filler complications are uncommon but real — granulomas and inflammatory nodules occur in 0.01% to 1% of cases, sometimes appearing years after injection. Korean dermatology and plastic surgery have refined treatment algorithms for these complications. This guide explains what to recognize and how to treat.
What granulomas and nodules are
Filler nodule
- Visible or palpable lump at injection site.
- Various causes: overcorrection, infection, allergic reaction, granuloma.
- Time to onset varies.
- Different treatment by underlying cause.
Granuloma
- Specific type of nodule.
- Inflammatory reaction with specific histologic features.
- Foreign body reaction to filler.
- Latent period: months to years after injection.
- Can occur with all soft-tissue fillers.
Distinguishing types
- Inflammatory nodules: typically early, infection-related.
- Granulomas: typically late, foreign body reaction.
- Different treatment approaches.
- Diagnostic biopsy sometimes needed.
Why they form
- Foreign body inflammatory response.
- Bacterial biofilm formation around filler.
- Allergic reaction.
- Filler product impurities.
- Injection technique factors.
- Genetic predisposition.
Risk factors
Filler-related
- Permanent fillers higher risk than HA.
- Poor product quality.
- Unknown filler type (counterfeit, illegal).
- Multiple layers of different fillers.
Injection-related
- Inappropriate injection plane.
- Excessive volumes.
- Bacterial contamination.
- Inadequate antiseptic technique.
Patient-related
- Active infection at injection time.
- Compromised immune system.
- History of dental procedures (oral cavity bacteria).
- Skin barrier compromise.
Treatment options
Intralesional corticosteroid
- First-line for granulomas typically.
- Triamcinolone acetonide most common.
- Reduces inflammation.
- Series of injections (4-week intervals).
- Good response in many cases.
- Side effects: atrophy, telangiectasia.
Hyaluronidase (for HA fillers)
- Dissolves HA filler.
- Effective for HA-related granulomas.
- Multiple sessions sometimes needed.
- Standard initial approach for HA complications.
- Doesn\'t work for non-HA fillers.
5-FU plus corticosteroid
- For steroid-resistant granulomas.
- Combination injection.
- 5-fluorouracil discourages fibroblast activity.
- Effective in many resistant cases.
- More aggressive treatment.
Antibiotics
- For bacterial biofilm component.
- Often combined with other treatments.
- Long-course oral antibiotics sometimes.
- Targeted by sensitivity if cultured.
Laser treatment
- 1444 nm Nd:YAG laser intralesional.
- Korean-developed technique.
- For resistant cases.
- Effective in many cases.
- Minimal scarring.
Surgical excision
- For lesions resistant to medical treatment.
- Last resort typically.
- Some scarring.
- Definitive removal of filler material.
- Sometimes combined with reconstructive technique.
Treatment algorithm
For HA filler complications
- 1. Hyaluronidase first.
- 2. Repeat hyaluronidase if partial response.
- 3. Add steroid injection if persistent.
- 4. Consider 5-FU if steroid-resistant.
- 5. Surgery for refractory cases.
For non-HA filler complications
- 1. Antibiotics if infection suspected.
- 2. Intralesional corticosteroid.
- 3. 5-FU + steroid combination.
- 4. Laser treatment for resistant.
- 5. Surgical excision if all else fails.
Korean clinic experience
- Refined treatment algorithms.
- Korean research contributing to international protocols.
- Specialized clinics for filler complications.
- Multi-modal approach standard.
- Long-term follow-up emphasis.
Diagnostic considerations
Clinical assessment
- Time since filler injection.
- Filler type if known.
- Onset characteristics (acute vs gradual).
- Associated symptoms (pain, redness, drainage).
- Photographic documentation.
Imaging
- Ultrasound for nodule mapping.
- Distinguishes from cysts and other masses.
- Guides intervention.
Biopsy
- For diagnostic clarification.
- Distinguishes granuloma from other masses.
- Used in atypical presentations.
- Identifies filler type sometimes.
Pricing for treatment in Korean clinics
- Hyaluronidase per area: ₩100,000–₩400,000.
- Intralesional steroid: ₩100,000–₩300,000.
- Combination 5-FU + steroid: ₩200,000–₩500,000.
- Laser intralesional: ₩300,000–₩800,000.
- Surgical excision: ₩1,000,000–₩4,000,000.
- Multi-session protocol typical.
What patients should know
- Filler complications can present years later.
- Treatment typically multi-session.
- Identify filler type if possible (helps treatment).
- Bring records from original injection.
- Don\'t add more filler to fix complication.
- Korean clinics with complication experience exist.
Prevention
- Use only verified, FDA/MFDS-approved fillers.
- Reputable clinics with experienced injectors.
- Aseptic technique.
- Avoid permanent fillers when possible.
- Don\'t layer multiple types.
- Address dental procedures and infections before filler.
For international patients with complications
- Bring documentation of original filler.
- Photos of progression.
- Recent imaging if performed.
- Be patient with multi-session approach.
- Plan for several visits or extended stay.
Outcomes
- Most cases resolve with appropriate treatment.
- Surgical excision rarely needed.
- Full resolution may take months.
- Some residual scarring possible.
- Function and aesthetics typically restored.
The honest framing
Filler complications including granulomas are uncommon but treatable — Korean dermatology and plastic surgery have refined effective treatment algorithms over decades of experience. The patients who do well seek treatment promptly, work with clinics experienced in complication management, accept multi-session protocols, and provide complete documentation of original filler injection. The patients who try to "fix" complications with additional filler, or who delay seeking treatment hoping resolution will spontaneously occur, often face worse outcomes. Use only reputable products and injectors; if complications arise despite this, prompt expert treatment leads to good outcomes in most cases.