You may be affected by the sudden reddish rash on your face along with the formation of small blisters or pustules almost resembling acne flare-ups. The entire face including nose and forehead are affected which often reaches the scalp. This may arise due to some bacterial infection or genetic disorders. No doubt, the reddish patches on your face spoils the appearance and certain factors like stress, exposure to sunlight, sudden temperature fluctuations and climatic changes can cause this typical skin disorder. Rosacea is not contagious but is incurable. One needs to be cautious and avoid the triggers to prevent rosacea. You can check this facial rash effectively at home through some simple treatments.