Hello.it can be urinary tract infection . Or sexulally transmitted infection.the urine should be cultured and drug sensitivity should be tested .check whether discharge( any oozing liquid over clitoris or genital area present or not .have an ultrasound of examination of abdomen.
Next Steps
please abstain sex until your wife recovers.also check husbands urine also .if you also have any infection abstain sex until wife and husband completly cured .if stiil not cured means you need further tests and investigations.
Health Tips
pass the urine with force.drink lot of water.always pass urine when you just have a feel to pass urine.pass the urine before going to bed .dont drink water 1 hour before sleep