Just for the record, I did not say that alcohol causes rosacea. It does, however, aggravate a rosacea or pre-rosacea condition by dilating the blood vessels.
Per the link to the Mayo Clinic
Although the exact cause of rosacea remains a mystery, a number of factors can aggravate it or make it worse by increasing blood flow to the surface of your skin. Some of these include:
* Hot foods or beverages
* Spicy foods
* Temperature extremes
* Stress, anger or embarrassment
* Strenuous exercise
* Hot baths, saunas
* Drugs that dilate blood vessels, including some blood pressure medications>>
I confess that I am not a doctor, but I don't see any reason to rule out a mild pre-rosacea condition.
Just a comment, not an attempt at a diagnosis.