Black Lump Under Incision After Upper Blepharoplasty (Double Eyelid), What Could this Be? (photo)

The black lump present in your eyelid surgery may be any number of things, a retained stitch that is now encapsulated, possibly some mascara or eyeshadow that got into a scab on your suture line, or any number of other culprits.  The treatment is relatively simple.  It can be done in the office in about 3 minutes with minimal to no pain. 

Have a second discussion with your plastic surgeon, and ask him to remove it no matter what the etiology of the problem is.

Your plastic surgeon should be able to better answer this question, based on his examination. You can get another opinion from a facial plastic or oculoplastic surgeon.

What you are feeling is more than likely a piece of retained suture.  You should hae your surgeon evaluate it and remove it.

The absorbable suture should resolve after 4-6 weeks depending on the type od suture used. Sometimes suture reaction occur which causes a suture granuloma. This occurs when body develops a wall of scar around the suture, particularly around the knot. It may require exploration. 

This is could very likely be a retained permanent suture from your Eyelid Surgery.   You should have the plastic and cosmetic surgeon, that did your eyelid surgery examine the isue and treat you accordingly.