I’ve heard about increased ACNE due to finasteride usage. This doesn’t sound completely wrong since we all know what finasteride does to the hormones.
My question is, could increase in T and decrease in DHT in any way affect my early signs of rosacea?
I am not sure. Rosacea is not acne. Are you experiencing acne? If Propecia (finasteride 1mg) does affect your rosacea, would that cause you to stop using it? Moreover, acne probably is a very rare side effect that you may not even experience.
Maybe you are over thinking this whole thing and losing sight of why are you are (or will be) using the medication? Please consult the doctor who is prescribing your Propecia and get his/her advice. For more information on rosacea, please see The National Rosacea Society.