Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Intervertebral disc disease ?
    ### Response:
    Intervertebral disc disease (IDD) is a common musculoskeletal condition that primarily affects the back. It is characterized by intervertebral disc herniation and/or sciatic pain (sciatica) and is a primary cause of low back pain, affecting about 5% of individuals.
    