Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Urinary Tract Infections ?
    ### Response:
    A Common Problem With Aging Urinary tract infections (UTIs) are a common bladder problem, especially as people age. UTIs are the second most common type of infection in the body. Each year, UTIs cause more than 8 million visits to health care providers. UTIs can happen anywhere in the urinary system (which includes the kidneys, bladder, and urethra).
    