Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Mycetoma ?
    ### Response:
    Mycetoma is a chronic infection that is caused by fungi or actinomycetes (bacteria that produce filaments, like fungi). The first symptom of the condition is generally painless swelling beneath the skin, which progresses to a nodule (lump) over several years.
    