Not medical advice: If you feel like you need to urinate but can't, you may be suffering from a urinary tract infection, kidney stones, or prostate problems (men).
Other possible causes of urination difficulties include a medication reaction or side effect, bladder prolapse, and uterus prolapse.
Contact your physician if you've experienced difficulty passing urine for more than 24 to 48 hours. Get medical attention right away if you also have a fever, shaking chills, pain in flank or back, or blood in the urine. These symptoms indicate the possibility of a kidney stone.
The Mayo Clinic suggests steps to reduce your risk of urinary tract infections.
Of interest, according to researchers there's a new tool that can accurately predict whether someone who has had a kidney stone will experience another one in the future. 6 percent of women and nine percent of men in the U.S. have had a painful kidney stone. Get the scoop from WebMD.