When rosacea first develops, the redness may come and go. Some people may flush or blush and never form pustules or papules. Small dilated vessels also may be present due to prolonged sun exposure. However, when the skin doesn't return to its normal color, and when other symptoms such as pimples and enlarged blood vessels become visible, it's best to seek advice from a dermatologist. The condition may last for years, rarely reverse itself, and can become worse without treatment.