What causes Rosacea?

The exact cause is not known. A number of factors may be involved. However, none of these factors has definitely been proven to be the cause. For example:

·        Tiny blood vessels under the affected skin may become abnormal or leaky.

·        Sun damage.

·        A tiny mite called demodex folliculorum may be involved. It lives harmlessly on the skin of many people but has been found in higher numbers in those with rosacea.

·        Abnormal immune reactions in the skin, which lead to inflammation.

·        Genetics may also be involved as rosacea may run in some families.

Long-term use of steroid creams on the face can cause a condition identical to rosacea. This used to be quite common. However, the danger of overusing steroid creams is now well known, and this is now an uncommon problem.