Causes and Diagnoses

Causes and Diagnoses of Rosacea

The exact cause of rosacea isn’t known, but researchers are working to determine its origin. It is known that rosacea runs in families, so there may be a genetic component to the disease. Other causes being investigated are:

  • Immune system: Some rosacea sufferers have an overreaction to a particular bacterium.
  • pylori: A common digestive bacterium that’s normally associated with stomach ulcers may play a role.
  • Demodex (a mite): This mite is commonly found on the skin of the nose and cheeks, where rosacea first appears.
  • Cathelicidin (a protein): This normally occurring protein usually protects the skin from infection, but may cause swelling and redness in some people.

Rosacea triggers include:

  • Exposure to the sun
  • Stress
  • Heat or cold
  • Wind
  • Exercise
  • Hot baths or showers
  • Spicy foods
  • Alcohol

Diagnosing rosacea

 Your physician can diagnose rosacea during a physical exam and discussion of your symptoms.

Diagnostic Tests