Is it possible to dissolve only some of filler under eye & in cheeks with Hyaluronidase?

Longterm filler problems include migration, edema, and nodularity. Filler migration and permanence is a very common problem because there are many different types of HA fillers on the market and each is specified for a specific part of the face. Use of highly cohesive fillers on thin skin may cause swelling and nodularity. If patients have filler migration or nodules, we recommend a combination approach of filler reversal with enzymes Hylenex and Hyaluronidase in different strengths to dissolve the filler. We may also need to add Kenalog to the mix in order to reduce fibrous tissue. If the filler does not dissolve, it either means the filler is not HA material or we need more enzyme. The HA reversal can be combined with other lasers and skin treatments at the same time, and it usually (usually) does not affect adjacent tissue.

Best,
Dr. Karamanoukian
Realself100 Surgeon

So it is possible to dissolve just some of the filler although you will inevitable be left with a slight empty baggy look in the area that you do that to. My advice is to use small doses, maybe 10-30 units per area of filler and inject into the deepest part. This will dissolve small volumes at a time without causing as much lumpiness or unevenness. Hope that helpsAdam Goodwin

Sorry to hear that you are not satisfied with your results. 
Hyaluronic acid fillers can be dissolved with the use of Hyaluronidase, however isolated dissolving of an 'area' can be difficult as the product will disperse into the surrounding tissues. Hyaluronidase is a soluble protein-based enzyme solution that breaks down and helps the body reabsorb hyaluronic acid. It's fast and effective, you should see reduction in the area within 24-48 hours. It is important to choose the right cosmetic surgeon who is dedicated to the Facial Plastic Specialty in order to achieve the top results.