I used to post about this alot. Pre-T I did use rogaine on my face. Yes, it can be slightly dangerous cause it's absorbed more readily in the face and can aggravate pre-existing heart conditions that you may not know of. But as long as you watch for chest pain or signs of low BP you should be fine. I did get some growth on my sideburns from using it. Don't use it anymore though, as I started T.