If you feel you can accurately diagnose an inflammatory nodule you should decide if it is fluctuant or not, if possible and with GP cooperation, it would be best practice to culture the area of collection. If abscess should ensure, surgical drainage with antibiotic cover is advisable, this should be referred to a hospital setting. Antibiotics should be commended for 7 days and then the patient reviewed, if not better hyalase with antibiotic cover should follow. Consider second line cover if not better, depending on clinical presentation, it may be advisable to commence this before reversal procedure. Monitor and consider hospital referral if no improvement and the patient begins to feel systemically unwell.

https://www.researchgate.net/publication/312300131_Overview_and_ management_of_fillers_complications