Why do i always feel like i need to urinate but i can't? i have no burning, itching ect. just always feel like i have to urinate but cant.

Here are some ...: Three possibilities to consider for feeling constant urge to urinate are UTI, bladder inability to accommodate / hold urine, & pending urinary retention. These are easy to figure out by analyzing the onset, degree, duration, evolution, & progress of urge to void and its potentially related symptoms over time, conducting physical exams, and testing UA, residual urine, etc. so to deduce possible Dx.