Had Juvederm under hollow of my eyes how long do I ice for?

Thank you for your question. Apply a cold compress to the area for 10 mins on 10 mins off as much as possible for 3 days. All the best, 

Icing is important for the first 48-72 hours after filler injections to sensitive areas, regardless of whether it is performed with the traditional sharp needle technique or with the bruiseless microcannula technique.   I personally dont treat tear troughs / eye hollows with Juvederm as I have found that it can often lead to a "swollen" or "doughy" look even weeks to months after the injections -- this is thought to be the case because Juvederm is more hydrophilic, or draws more water, than the other Hyaluronic acid fillers.  

Technically after 72hrs, icing will not do much in terms of reducing swelling/bruising. Bruising and swelling is very common to this area after filler and will resolve after 5-7 days.

I typically recommend that people ice for the first 48-72 hours after undereye injections. This is a common area for bruising after fillers. You can also sleep with your head elevated on a couple of pillows for the first 2-3 nights to minimize swelling.