Alum, witchhazel, aftershave, do they all do the same thing?

Used Thayers witch hazel for ever. Then I read an article in the world's leading medical journal, Yahoo Health, that suggested witch hazel can trigger rosacea and switched to a 444 alum block. Sure miss my witch hazel. Polish things off with a nice dose of Bellos Bay Rum Lotion.
 
Used Thayers witch hazel for ever. Then I read an article in the world's leading medical journal, Yahoo Health, that suggested witch hazel can trigger rosacea and switched to a 444 alum block. Sure miss my witch hazel. Polish things off with a nice dose of Bellos Bay Rum Lotion.
I had never heard this. I'm a witch hazel user and rosacea sufferer. I hadn't noticed a link, although I'm careful not to get ANY shaving-related stuff onto the areas where rosacea tends to flare.

Do you have a link for that article?
 
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