Dark Circles After Lower Blepharoplasty

Maz,

Lingering darkness after belpharoplasty is often due to deeper bruising that is taking time to resolve. There really is no magic to make it go away faster. You may want to try Arnica Montana cream and massage it into the area. If it is from bruising, then the pigments will not respond to skin lightening creams like hydroquinone. However, if it is due to pigmentation, then treatment with hydroquinone may help - but it make take several weeks to even start seeing a difference. Good luck.

Dear Maz
First if a photograph is worth a thousand words, a personal consultation must be worth a million words. However, here at Realself.com we are happy to give you our best off the cuff impressions.
I think that 7 week is more than enough time for bruising to resolve. Hemosiderin staining which is tissue staining from the break down of blood is most unusual. Also, lower eyelid surgery is not associated with post inflammatory hyperpigmentation except at the incision site.
A lot of color issues are optical. I suspect that the darkening you are seeing has to do with internal reflection of light in the skin due to the change in how your skin now lays with the lower eyelid bulges gone. If I am right, no matter how long you wait this increased darkness will not resolve. If the darkness resolves then I am wrong.
If I am right, I recommend that you learn to live with this change. With every surgery, there can be unforseen consequences. Hopefully the improvement in the lower eyelid contour more than makes up for the darkening of the lower eyelids.

What you are describing most likely represents breakdown products of the bruising (blood) which can have a bronze to brownish color. Some of this is common at 4 to 6 weeks after a lower blepharoplasty. It may be more pronounced in people with darker skin color.
This virtually always goes away but it may take as long as 3 or 4 months. Sometimes specific laser treatments can speed up the process. Talk to your eyelid surgeon; it sounds that he has done a fine job; the skin reaction is somewhat out of his control.