Hip pain when walking is most likely caused by hip joint pathology, especially hip bursitis. The hip bursa will exude due to prolonged strain or continuous cold stimulation, stimulating the surrounding soft tissues to inflammation. The soft tissues around the hip joint include the sciatic nerve, and once the inflammation irritates the nerve, a tendon pain or radiating pain will occur. The sciatic nerve is located next to the pelvis and extends down near the hip joint to the leg and ankle. When the inflammation is mild, only painful symptoms in the hip or joint will occur, and when the hip joint is moved, the painful symptoms will become obvious. Once the inflammation worsens, the nerve irritation will also worsen, resulting in pain in both the hip and leg, which may affect the walking of one lower limb.