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.