Q. I have thin skin on my feet and ankles with swelling and bluish/purple dots around my left ankle. My brother-in-law (GP) saw photos and thinks it’s cellulitis. 

Could the Firefly be useful for cellulitis? What lights and how long…or how do you suggest I use it?

A. As cellulitis can be quite serious, I think you need to see your primary care in person. 

If/when they clear you from it being a serious case, you may use the Firefly with all 3 lights for 2 minutes on each foot/ankle.  You may gradually increase the time if you are not seeing results, in this case reduction of swelling.