Can Hyaluronidase Be Applied Partially?

Hi Len.  Injecting Hyaluronidase so that just some of the product is dissolved is difficult.  While this may be accomplished using a small amount of the hyaluronidase, it's very possible that you would get a little bit more or a little bit less than what you wanted.  It's hard to get it exactly right.  

Dilution can vary with hyaluronidase and the treatment can be done in intervals to avoid overuse or overdissolution of the facial fillers. 

A trained Physician can inject Hyaluronidase to patially or fully dissolve the filler.  I would first check to make sure that you do not have residual swelling.  If you do, waiting would be best.  If there is no swelling, just excess filler, than injecting H dase will dissolve the excess.