My mother age 52 has a urinary retention problem and sometimes she is unable to pee. In the past 1 year this problem arose two times and she was taken to a doctor. Doctor used a cathetar for the relief. The reports for ultrasound and urinary culture were okay showing signs of urinary retention I want to ask of such problem arise in the middle of the night or in a remote place having no cathetar facility then what to do? Can my mother use cathetar herself for the relief?