Is bruising and swelling of right eye due to microneedling or the thread lift? (Photos)

Thank you for posting your photographs.
It is unlikely that bruising has been caused by micro-needling.
Bruising can occur when Silhouette Soft threads are inserted and it appears that in your case this has happened near to the exit points in the temporal area, close to the hairline. Internal bleeding can spread to the eye and cause the bruising around the eye.
However, although it looks unsightly, it will resolve. I recommend that you take Arnica for 4-5 days and this will help the bruising to go more quickly.
With best wishes
Dr Ian Hallam MBE

Thank you for your photos. It is unlikely that this bruising
is from Silhouette Soft threads. It is a bit unclear from your question when
you last had a treatment to get this result and what treatment it actually was?
You mention that both procedures were done 4 months ago?  This latent bruising will be from another
procedure. Have you contacted the doctor who carried out the treatment?
I am unable to give you specifics at this time as I am
little confused as to why you have this bruising and in particular for the
right eye only.