The causes of lumbar soreness and distension in men are as follows:1. It may be due to cold that causes muscle spasm in the lumbar region and the manifestation of lumbar soreness and pain.2. It may be a problem of the urinary system, especially stones in the urinary system and kidneys, which may cause unilateral lumbar soreness and distension and pain manifestations.3. Due to a long period of time of sedentary activities and prolonged standing, which results in excessive pressure on the lumbar vertebrae and fatigue damage to the muscles, it may also cause men to experience painful symptoms of lumbar soreness and leg swelling.4. The symptoms of lumbar soreness or swelling can be seen when couples live too often, are too tired, or have a strenuous couple life. Therefore, men with symptoms of back pain or swelling, must be seriously attention, timely go to the regular hospital to choose a reasonable treatment method is very critical.