Thank you for your question. It is always best to sleep with your head slightly elevated and apply cold compresses for 10 mins several times a day. The product should dissolve in approx. 1 year.
Puffy under eyes after hyaluronic acid
Hyaluronic acid (Juvederm) fillers are very hydrophilic and attract water. I would give it another month. If there is still swelling after waiting longer, I would consider treating with a small amount of the enzyme Vitrase which if done well doesn't entirely remove the Juvederm but just enough to lessen swelling.
I am into natural remedies when possible but i would not recommend anything else, except to prop up on extra pillows while sleeping to help control swelling.