Many over the counter facemasks are full of chemicals, which would undoubtably make the skin condition Rosacea worse. I recommend you use this home made facemask once a week, or whenever your skin flares up. 
1/4 cup cottage cheese*
1 Tablespoon natural full fat yoghurt *
1/2 banana*
1 Teaspoon Apple Cider Vinegar*
(*organic if possible)
Blend all ingredients together until smooth. Apply to face and neck and leave on skin for 10 minutes. Rinse off with tepid water. Pat dry with clean, soft towel.