Osteophyte formation in the lumbar vertebrae can lead to herniated discs, or direct compression of the corresponding nerve roots, particularly at the L5-S1 position, causing numbness and soreness in the sole of the foot. Thus, for specific areas of osteophyte formation, compression of the nerve roots can result in numbness in the foot. Additionally, osteophyte formation in or around the sole of the foot, compressing corresponding blood vessels or nerves, can also lead to localized numbness in the foot or a decrease in skin temperature, further inducing sensations of numbness or tingling in the foot. Therefore, it is necessary to determine the specific cause of foot numbness based on the location of the osteophyte formation and the corresponding mechanisms.