Refilling hematoma after a facelift 11 days ago. Should I be worried? (photos)

I am very sorry about your difficult recovery.  Your situation, although it doesn't occur commonly, is something that can happen in the postoperative phase.  Close contact with your Surgeon, and possible insertion of a drain (seromacath) might be required given the recurring nature of this problem. 

If your hematoma keeps recurring, it is either because not all of the blood was originally removed, and the resulting inflammation from the blood keeps causing fluid accumulation, OR there was an injury to the parotid gland and some saliva is leaking into the cheek. You need close follow-up with your surgeon and some consideration to opening the incision to make sure all of the blood has been removed and there is no salivary gland leakage. The latter is less likely, but you do have extensive bruising, and if the fluid keeps reaccumulating, more aggressive intervention is indicated.

This is an unusual situation but it is important to keep seeing your plastic surgeon to have the fluid aspirated until it resolves. The bruising may take a little longer to resolve and it is important to avoid overactivity during this period.