In general, when the above-mentioned soreness is present, after excluding muscle soreness due to lactic acid build-up in over-exercised muscles, the disease factors to be considered are: 1. ankylosing spondylitis; 2. lumbar disc herniation. Generally, ankylosing spondylitis is characterised by morning stiffness of the lumbar spine in the early morning and soreness in the above-mentioned position, which is relieved by activity, whereas lumbar disc herniation is characterised by persistent soreness in the above-mentioned position. It is advisable to go to the hospital to improve the relevant tests after the occurrence of such symptoms to clarify the diagnosis for further treatment.