Right lumbar soreness may be caused by long-term strain, environmental factors and other physiological reasons, but also may be caused by lumbar diseases, urinary system diseases and other pathological reasons. 1. Physiological reasons: often engaged in heavy physical labor or sedentary people, may lead to fatigue injury of the lumbar muscles, lactic acid, leukotrienes and other metabolites accumulation, the performance of soreness; in addition to long-term cold and damp environment, may lead to the local contraction of small blood vessels, muscle spasm, may also appear in the lumbar soreness and swelling of the symptoms. 2. Pathological causes: lumbar muscle strain, may also appear soreness and swelling symptoms, such as acute lumbar sprain patients; lumbar disc protrusion, lumbar spondylolisthesis and other conditions, may lead to lumbar muscle stiffness, edema, may also lead to the appearance of the above symptoms; urological, gynecological diseases of radiating pain, may also appear in the lumbar soreness and swelling of the manifestations, such as the right side of the kidney stone, the right side of the tubal inflammation, and so on. The symptoms of right lumbar soreness and distension alone sometimes can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor.