Lumbar pain in men can be caused by herniated discs, kidney stones or lumbar muscle strain. 1. Herniated lumbar disc: after herniated lumbar disc, it will often produce pressure on the surrounding nerve root tissue, which in turn produces lumbar pain and other uncomfortable symptoms, and with the aggravation of the condition, the symptoms of lumbar pain will continue to aggravate. 2. Kidney stones: When kidney stones are formed in the kidneys, the stones may cause irritation to the kidneys, resulting in back pain and sometimes accompanied by hematuria. 3. Lumbar muscle strain: long-term physical labor may lead to the occurrence of lumbar muscle strain, and there may be chronic inflammation of the muscle tissue, then there will be back pain symptoms. If the boys complain of lumbar pain, it is necessary to carry out lumbar magnetic resonance or CT and other imaging tests to determine the cause of the disease, pay attention to appropriate rest and avoid excessive lumbar stress, usually slowly return to normal, if the lumbar pain is more intense, the need to consult a doctor in time for examination and treatment.