Thanks for posting your query at DoctorSpring.com
The symptoms that your wife is having are that of a urinary tract infection for sure, and maybe accompanying vaginal infection too.
Such infection generally needs an antibiotic, and you should have a complete urine examination routine and microscopic and a urine culture test plus a vaginal swab to diagnose the exact type of infection, and to know which drug will cure it.
Temporarily, ask her to drink a lot of water.
She can apply cold compresses to the vaginal area , it is best not to self medicate without the reports.
Also, immediately see a doctor and get the tests done so that the treatment can be started as early as possible.
All the best
Please feel free to discuss further.