Why would voluma cause swelling and tenderness two weeks after the injection?

Thank you for your question. Follow up with your injector to discuss hyaluronidase injections to dissolve the product. Voluma injections is typically used for deep dermal injection such as the cheeks. Perhaps consider an alternate product for the under eye. Best, 

I am sorry to hear that you're having difficulty after your Voluma injections. Without examining you, it is of course impossible to say with certainty why you are experiencing these symptoms. However, what you are describing sounds as if it may require  prompt treatment.  You might consider asking your doctor for a referral to another expert for a second opinion.

You should return to your doctor and get a satisfactory explanation and treatment plan ASAP. If he can't help you, please see a plastic surgeon with experience with fillers.Generally, fillers such as volume do not cause headaches and tenderness.Best wishes.

What you are describing sounds like an infection of some kind, possibly cellulitis. I would recommend an in-person exam by your doctor, and/or a referral to someone else too if your injector isn't sure. If it is an infection, prompt treatment is key!"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."