Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Proteinuria ?
    ### Response:
    Proteinuria has no signs or symptoms in the early stages. Large amounts of protein in the urine may cause it to look foamy in the toilet. Also, because protein has left the body, the blood can no longer soak up enough fluid, so swelling in the hands, feet, abdomen, or face may occur.
    