Hello and welcome to HCM.
Thank you for your query.
Sounds to me like your friend could be suffering from a urinary tract
or bladder infection. I would advise you to take her to a urologist
for a thorough examination, along with a urine analysis and urine culture study. This will help rule out/confirm the diagnosis, and also provide information on the most suitable antibiotic which would help cure your friend.
In the meantime please help her with plenty of water to drink and even cranberry juice if available.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you.