Is Missing Facial Hair a Side Effect of Rogaine?

I have been using Rogaine 5% topical solution regularly for about 6 years now. It has worked marvelously for preventing the thinning of my hair at the back of my head.

Just recently I noticed two large, circular patches on my chin and neck where facial hair no longer grows. I grow a goatee and didnt mind the two empty patches but now another small, circular patch has developed in my goatee area. Could this be a side effect of using Rogaine?

Thank you for any assistance you can offer.

I would worry more about alopecia areata or fungal infection as a cause, which require a good doctor to make the diagnosis. I would doubt that this is a side effect of Rogaine.