Today my boyfriend's mother had gone through a minor operation of sample collection from the cervix for biopsy test. Now she is unable to pee. She is having a feeling that her urinary bladder is full but whenever she is going to pee, sufficient urine is not coming out. And as a result she is getting tensed and a feeling of discomfort is going within her. What will she do to normalize this situation? Is there any medicine or self-treatment to normalize this situation? And how long will it take to recover from this situation and urinate normally?