Is Rosacea caused by a bacterial infection?

Well there is some evidence that the bacteria which causes peptic ulcer disease ( H pylori) may also be responsible for rosacea- but for the moment it is all speculation. Other experts think that perhaps some small skin mites (Demodex folliculorum) which reside on skin may plug the hair follicles and block the sweat pores. However, no one really knows why rosacea occurs