Why is it difficult to urinate?

The reasons for dysuria are as follows: First, urethral stones, when the stones stuck in the urethra will cause urinary tract obstruction, this time will show dysuria. Second, prostatic hyperplasia, prostatic hyperplasia oppression urethra, urethral narrowing will also show dysuria symptoms, patients may also show urine line thinning, and even show urinary retention. Third, prostatitis patients, due to inflammation damage caused by prostate edema, urethral compression will also show urethral narrowing and show difficulty in urination, urine line thinning and other performance.