My Lip Filling is Swollen, Suddenly After 7 Months. Causes? What Can I Do? (photo)

You have done the absolute right thing to report this unusual reaction.  It is impossible to make a definitive diagnosis without knowing more:  If you ate anything or your lips were exposed to any unusual potentially allergenic contact within the past 24 hours, and exactly what the lip filler was.  This type of disproportionate swelling has occurred in the past with certain fillers, and may represent a delayed inflammatory "foreign body" response.   Return to the doctor who performed the injections for advice and possible treatment.  This may be a reportable event/complication.  I've seen this even after using autologous dermal fat graft to the lips, perhaps an allergic reaction to povidone-iodine in which the graft was bathed prior to implantation.  Hopefully, the swelling will or has already resolved.

Swelling in the lips can be inflammatory in nature and can sometimes occur with silicone or Bioalcamid injections.  Ask your clinician to detail the type of filler injected.  If it is silicone, there are options for removal of part of the silicone. 

Swelling is apparent in the photos.  However, it would be best to do a detailed consultation with history and physical to diagnose if this is linked to the filler or is an allergic reaction.  Most likely, it is an allergic reaction.