Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Rosacea ?
    ### Response:
    Rosacea is a long-term disease that affects your skin and sometimes your eyes. It causes redness and pimples. Rosacea is most common in women and people with fair skin. It most often affects middle-aged and older adults.    In most cases, rosacea only affects the face.
    