Always feel like urinating but can not urinate, it is recommended to go to the hospital for further examination to clarify the possible causes. 1, acute cystitis, inflammation leads to bladder mucosa congestion and edema, it will cause the bladder mucosa sensitivity to increase. When a small amount of urine comes out of the bladder, it can stimulate a strong sense of urination, because the volume of urine is too small, so in the process of urination will feel the effort to urinate or can not urinate, you need to carry out urine routine or urine culture laboratory tests to further confirm the diagnosis. 2, ureteral end stones or bladder stones, can cause bladder irritation, produce frequent urination, but the volume of urine is not much, also can be accompanied by back pain 3. Overactive bladder syndrome, which is mainly manifested by frequent contraction of the bladder muscle for unknown reasons, can cause frequent urge to urinate, but because of frequent contraction of the bladder, the volume is relatively small, so the volume of urination is not much or it is difficult to urinate, so it is necessary to go to the hospital for further It is necessary to go to the hospital for further urodynamic examination for further clarification.