One type of dysuria is the feeling of always wanting to urinate because there is residual urine in the bladder that cannot be effectively removed completely. This situation is likely to be benign prostatic hyperplasia, prostate tumors, obstructive lesions of the bladder neck, such as bladder neck contracture. There may also be valvular disease of the posterior urethra, compression of the bladder and urethra by the pregnant uterus, or urethral stenosis, as well as neurologic lesions, such as spinal cord or cauda equina injuries, which can lead to the development of neurogenic bladder. The other is that there is inflammatory stimulation of the bladder, resulting in a non-stop sensation of urination. In this case, there is not much urine in the bladder, and the urine can be completely emptied after each urination, and this kind of incomplete urination is a manifestation of bladder irritation sign.