Eye bags worse after filler Restylane under eyes. Is it fluid or fat? Is surgery a good choice? (Photo)

This may be due to placement. If you're unhappy with your results, the filler can be reversed. Surgery is an alternative. Surgery would require a fat-repositioning lower lid blepharoplasty. In this surgical procedure, fat from the eye area is moved into the tear trough depression filling the actual depression. 
I hope this helps!

Thank you for your question. There are many things you can do to treat under eye bags, but a combination approach with nonsurgical treatments would give the most improvement: fillers (Belotero, Juvederm Volbella), lasers (Fraxel/CO2), Renuvion (J-Plasma), microneedling/PRP, Cosmelan peels and stem cells. A surgical option to remove skin and/or fat might be the best solution long-term. I suggest getting a formal evaluation with a cosmetic dermatologist to see what is best for you and your goals. Best, Dr. Emer.

Filler gradually breaks down after 9 months to a year.  It is used to disguise under eye irregularities, but the underlying original issue doesn't change.  If you were unhappy with filler you may want to consider lower blepharoplasty which will remove excess fat and skin, revealing a smoother under eye area.