Visible lumpiness after under-eye Hyaluronic acid filler injection, while uncommon, can occur if the skin under the eye is very thin, or if the filler chosen is too firm, or if too much filler is used. As such, it is better to choose softer versions of Hyaluronic acid fillers when patients have thin under-eye skin.
Mild lumpiness can also occur if there is bruising after the procedure. This should resolve naturally within a week. It is important not to take certain painkillers like aspirin, and not to consume alcohol immediately before and after treatment as they increase the chance of bruising. Certain techniques like using a blunt cannula to apply the filler, can be used to reduce the risk of lumpiness and bruising.
In general, good technique coupled with a sensible selection of the filler type and using an appropriate amount of filler should reduce the risk of lumpiness after under-eye filler treatment to a minimum.
Hope the above helps!
Cheers,
Dr Terence Tan