Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Systemic capillary leak syndrome ?
    ### Response:
    Systemic capillary leak syndrome is a condition in which fluid and proteins leak out of tiny blood vessels and flow into surrounding tissues, resulting in dangerously low blood pressure. Attacks frequently last for several days and require emergency care. Most cases of capillary leak occur randomly in previously healthy adults.
    