Can I use my HSA to Pay for Restylane?

I have a form of a facial nerve disorder and part of my face is paralyzed. I go to a special facial nerve clinic where they administer botox and facial filler – restylane – to try lessen the synkinesis from the nerve damage and the restylane to try and make my face look more normal ( the facial paralysis results in twitchy painful muscles and a droop on one side).

The botox is covered under my medical plan but the restylane is not and I have to pay out of pocket.
Can I use my HSA funds to pay for this restylane?