I've been using finasteride for about 8 months or so. I've started adding minoxidil into the regimen. It's Rogaine 5% extra strength foam. I apply it once a day. I ended up getting this blister as you can see in the image, it's more crusty looking. It's not painful or anything, it's jsut there and i dont know what it is. Will it cause scarring ? and did any of you guys it when you started minoxidil. I mean its been about a week and i can see minor hairs coming out but then these are appearing on my forehead as you can see too, i am using the foam so i'm not sure how it is dripping :s.