Soreness on one side of the hip may be caused by a herniated lumbar disc, resulting in sciatica. A herniated lumbar disc is more likely to occur in the elderly, while young people can also suffer from a herniated disc if the lumbar area is improperly stressed. If the disc protrudes to one side, it can compress the corresponding spinal nerve root, resulting in soreness in the patient’s lower back, and can also cause pain due to compression of the sciatic nerve. Patients may experience pain in one hip, which may radiate down to the back of the thigh and calf. A CT examination of the intervertebral disc can be performed to clarify the diagnosis, or an MRI of the lumbar disc can also be performed. After the diagnosis is clear, conservative treatment, that is, sleeping on a flat bed and taking oral painkillers, such as Celecoxib, can provide relief if treated conservatively for a period of time. If the pain is still not relieved after a long period of time, or even if the pain gradually worsens, surgery can also be considered.