Doctors don't know the exact cause of rosacea. Some doctors
think rosacea happens when blood vessels expand too easily, causing flushing.
People who blush a lot may be more likely to get rosacea. It is also thought
that people inherit the likelihood of getting the disease.
Though not well-researched, some people say that one or more of
these factors make their rosacea worse:
Skin is just like the humans who wear it: It's not perfect. In a perfect world, the skin would be evenly pigmented (have even tone) without discolorations.
But that's not the case. There are birthmarks and other pigmentation disorders that affect many people. We've included some of the most common pigmentation problems here.
Remember: never self-diagnose! If you think you have one of these skin pigmentation abnormalities, make sure you visit a doctor to receive an official diagnosis.