Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Localized scleroderma ?
    ### Response:
    Localized scleroderma is characterized by thickening of the skin from excessive collagen deposits. Collagen is a protein normally present in our skin that provides structural support. However, when too much collagen is made, the skin becomes stiff and hard.
    