NHS Dermal Fillers: Risks, Infection and Lumps

Dermal fillers are commonly hyaluronic acid gels injected beneath the skin to add volume and smooth lines. Complications range from expected minor effects such as bruising, swelling and temporary tenderness, to less common problems including infection, persistent lumps, granuloma formation and, rarely, more serious vascular events. The NHS highlights that complications can be serious and that choosing who performs the procedure matters. [1]
Infections may be immediate, from skin bacteria introduced at the time of injection, or delayed, from low-grade bacteria around a filler pocket. Lumps can be simple collections of filler, inflammatory nodules or scar-like granulomas. Most complications are treatable, but some need specialist care and longer recovery.

Infection after filler is uncommon, but it happens. Immediate infections usually come from bacteria on the skin entering the injection site. Delayed low-grade infections may present weeks to months later with swelling, soreness or a persistent lump. Other causes of delayed inflammation include delayed hypersensitivity or biofilm, where bacteria form a slimy layer around the filler and are harder to eradicate. [1]
If you develop fever, spreading redness, increasing pain, or a painful, warm swelling after treatment, seek prompt medical attention. Early antibiotics and specialist assessment reduce the chance of more extensive treatment. The NHS and regulatory bodies encourage careful infection-control standards and prompt reporting of device or product safety issues. [2]

Lumps after filler may be soft and moveable, often due to product settling or small collections of gel. These are usually easy to manage and can respond to massage, time or, for hyaluronic acid fillers, hyaluronidase enzyme which breaks the product down. Firm, persistent nodules might be inflammatory or granulomatous, sometimes caused by a chronic immune response or biofilm. These nodules can be tender, red or unchanged in colour. [1]
Correct diagnosis matters because treatments differ. Simple filler lumps respond to hyaluronidase or conservative measures. Inflammatory nodules might need antibiotics, steroid injections or referral to a dermatologist or plastic surgeon. If a lump appears months after treatment, mention the date and clinic where you had the procedure when you seek help.

Seek urgent assessment if you have severe pain, spreading redness, fever, or any sudden vision changes after filler. These can indicate infection or a vascular event requiring immediate treatment. For lumps or persistent swelling without systemic symptoms, book a face-to-face review with a qualified clinician as soon as practical. Bring details of the product and the clinic, and photos showing progression if possible. [1]
At the appointment you can expect a clinical assessment, possible ultrasound for deeper nodules, and tailored treatment. Options include antibiotics for infection, hyaluronidase for hyaluronic acid lumps, intralesional steroids for inflammatory nodules, or referral to a specialist centre for complex cases. Good documentation and prompt management usually improve outcomes.

Many complications are preventable with good technique, appropriate product selection and infection-control standards. The NHS and government reports emphasise choosing regulated health professionals and clinics with clear safety systems. Ask about the practitioner\u0019s clinical qualifications, their experience with the specific filler you are being offered, whether they have recorded consent discussion and aftercare, and where they would refer you if complications arise. [1]
We do similar checks at The Gorgeous Clinic and discuss realistic outcomes during free consultations. If you want focused care for facial lines and volume, consider browsing the clinic pages such as [[LINK:hyaluronic-acid-dermal-filler|dermal filler: Lower 2/3 of Face]] for procedural detail. If you are considering treatment, a consultation is the safest place to start.