What are the causes and risk factors of rosacea?
The exact cause of rosacea is still unknown and remains a mystery. The basic process seems to involve dilation of the small blood vessels of the face. Suspected causes of rosacea include but are not limited to genetic factors, genetics plus sun exposure, a mite sometimes found in hair follicles (Demodex folliculorum), the bacteria Helicobacter pylori (that is associated with stomach ulcers), gastrointestinal disease, and medications that cause blood vessels to widen. There seems to be a hereditary component to rosacea in a large number of people. Often people have close family members with rosacea. Rosacea tends to affect the “blush” areas of the face and is more common in people who flush easily. Additionally, a variety of triggers are known to cause rosacea to flare. Emotional factors (stress, fear, anxiety, embarrassment, etc.) may trigger blushing and aggravate rosacea. A flare-up can be caused by changes in the weather like strong winds or a change in the humidity. Sun exposure an
