Rosacea often begins with a tendency to flush or blush easily. Many people who are affected by it are not even aware of their condition. The first symptoms of the disease are episodic facial flushes similar to those from heat or sun. In cases where the condition progresses, the face looks permanently flushed or sunburned. Additional facial symptoms include the appearance of small red-colored bumps or pimples that resemble acne and sometimes cause a burning or stinging sensation. It is also common for the small blood vessels on the nose and cheeks to swell and become visible. Like any chronic condition, rosacea is characterized by periods of exacerbation and resolution of symptoms. If left untreated, rosacea can cause thickening and textural changes to the skin, primarily on and around the nose, as well as lead to permanently irritated, watery and dry eyes. Although less common, the disease affects the neck, chest, scalp or ears. Scientists are still searching for the cause of the appearance of rosacea in some patients, and so far there is still no definite answer to this question.