Causes may vary from person to person, although there is a hereditary factor for some people. Redness in the face, often seen on the cheeks seems to be associated with the dilation of small visible blood vessels. Because there are four different subtypes of rosacea, the cause of one type of rosacea is often not the same as the cause for another type.

Causes are quite diverse; for some people, it may be caused by triggers and diet, for others, it might be the sun and sun damaged skin, for others, it might be made worse by alcohol and drinks.