Men with back pain after sex are considered to have kidney deficiency, which may cause back pain after intercourse, especially if intercourse is too frequent, the back pain symptoms will be more obvious. Too frequent intercourse may lead to soreness from muscle damage in the lower back. If there is a sudden interruption while having intercourse, it may also cause men to have back pain and soreness. Consider also the possibility of lumbar diseases, such as lumbar muscle strain and herniated lumbar disc can lead to lumbar soreness after intercourse. The reproductive inflammation may also cause back pain, such as the prostate gland is congested for a long time, may cause irritation to the lumbar nerves triggering back pain, it is recommended to go to the hospital for examination to clarify the cause.