Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Febrile Ulceronecrotic Mucha-Habermann disease ?
    ### Response:
    What causes febrile ulceronecrotic Mucha-Habermann disease? The cause of FUMHD is not known (idiopathic). A hypersensitivity to an infectious agent is suggested to be the main cause. Single cases of people with FUMHD and Epstein-Barr virus infection, adenovirus, or cytomegalovirus have been reported, but there has been no consistent finding so far.
    