The possible causes of hidden pain in the right side of the waist in men include urinary system diseases such as right ureteral stones, lumbar muscle strain, lumbar disc herniation, etc., so beware of these diseases. 1. Urinary system diseases: such as the right ureter, renal pelvis stones, often due to insufficient water intake, excessive protein intake, anatomical factors. Its onset is characterized by sudden severe pain, in which the upper urinary tract stones are mainly intermittent episodes of pain in the lumbar abdomen, which can also be manifested as vague pain. 2. Lumbar muscle strain: mainly due to long-term poor sitting posture or physical labor, often occurring in heavy lifting and other manual laborers, due to frequent persistent lumbar muscle force, resulting in the right or left lumbar muscle, fascia, ligaments and other tissues of the injury caused by pain. 3. Herniated lumbar intervertebral disc: Herniated lumbar intervertebral disc, the nucleus pulposus may press on the surrounding nerve tissues, resulting in pain in the right lumbar muscles, and in severe cases, there may also be numbness in the right lower limb and abnormal sensation of swelling. There are many reasons for the right side of the lumbar pain, it is recommended to go to the regular hospital in a timely manner to identify the cause and timely treatment.