What will happen if I use men's Rogaine in my eyebrows?

Mens Rogaine on eyebrows may or may not work to grow eyebrows. If by chance it works, you will need to use it daily.

Latisse works better, but minoxidil can help as well.  I suggest speaking to a physician who specializes in hair loss.  PRP and progesterone work even better. Best, Dr. Emer. 

Rogaine can cause shedding of the eyebrows, just like what you have described for scalp hair. However it's usually much less common and much less noticeable. 

Sometimes clients who start to use minoxidil on their head to reduce hair loss, start to regrow hair on their face.  Minoxidil could help with eye brow, however if it in your eye it may cause very serious problems.  Lattisee however was initially used for eye problem, therefore even though your are not suppose to get it in your eye, even if it does it won't cause as much problem as Minoxidil would.