Rosacea is a common skin condition that may show up from a period of weeks to months, before disappearing again for a period of time. It causes visible symptoms, such as blushing and can develop visible blood vessels in the face. The redness can look like a sunburn or a rash and in some cases it can cause small rounded, pus filled bumps. Causes of rosacea are numerous; from alcohol consumption to weather conditions such as sun or wind.