Rogaine should never
be used on any body part except for the head.
Rogaine is minoxidil which was developed as a blood pressure medicine, but an odd side effect was head hair growth. The hair on your chest is very different from the hair on your head, and since Rogaine is liquid high blood pressure medicine, putting it near the heart isn’t a very good idea, since it’s penetrating the skin.
Rogaine doesn’t really grow good, thick hair. It’s like baby fine hair and it doesn’t work on a receding hairline. It’s almost like an illusion of hair growth. It makes those thin areas look filled in more.
I don’t have a receding hairline, but I have some thinness on top. I used Rogaine about 5 years ago, and it caused tiny pimples on my head. It’s very oily and caused my forehead to breakout too. I only used it for about 6 months and didn’t like it at all.
It’s also a temporary fix. You have to use it for the rest of your life. If you are lucky enough to get some hair growth, it will start to shed a few months after you discontinue it.
The same is true for Propecia.