Hi, thanks for writing to HCM.
A shooting pain starting from your lower back and going down the leg till the ankle joint is most posssibly due to lumbar disc disease
. Whereas Pain in the hip joint radiating till the knee joint is most likely to be due to a Hip joint pathology.
An Xray of the Hip joint will show up the severity of the arthritic changes and depending upon your incapability in performing your activities of daily living, a total hip replacement
may be indicated.
Hope this information is helpful. Good day