Difficulty in urination in elderly men is associated with abnormalities in the urinary system and abnormalities in nerve function, and the main causes include prostatic hyperplasia, urinary stones, tumors, and nerve damage. 1. Prostatic hyperplasia: It is one of the common causes of dysuria in elderly men, which is mainly due to the pressure on the urinary tract caused by the hyperplasia of the prostate gland. 2. Urinary stones: especially bladder stones can cause urinary tract obstruction, leading to urination difficulties. 3. Tumor: malignant tumors such as bladder cancer and prostate cancer can cause compression and damage to the whole urinary tract system, which will lead to difficulty in urination. 4. Nerve injury: herniated lumbar intervertebral disc compressing the nerve root or spinal cord lesion affecting the nerve conduction will lead to abnormal innervation and cause difficulty in urination. Elderly men who have difficulty urinating, accompanied by the symptoms of hematuria, need to consult a doctor in time for observation and standardized treatment under the guidance of clinicians.