The disease evolves in stages.
Theses are so-called flushers and blushers.
Rosacea is common in the 20's and 30's and peaks between the ages of 40 to 50 years. The Contributing Factors Rosacea is a fairly common disease, especially in fair-skinned people of Celtic or Northern Europen heritage, hence the term curse of the Celts . The importance of sun-damaged skin in rosacea cannot be stressed enough. Rosacea is always associated with sun exposure, so protection of the skin with total sun blocks and cover ups is important. However, an increase in sun sensitivity has not been shown in rosacea patients.