Thank you for the query.
Brown urine can indicate blood in the urine or jaundice.
Blood in the urine is usually caused by urinary tract infection
or stones. However it is always necessary to rule out bladder cancer
(especially if you smoke and are in the middle age).
Urinary tract infection/stones give also burning when urinating, frequent urinating, lower abdominal pain
Jaundice due to liver diseases or bile ducts obstruction can give such symptoms as well. You may also have whitish stool, upper right abdominal pain, nausea, yellow skin, skin itching.
I suggest you to have some diagnostics. Start with urine analysis. In case of infection antibiotics are necessary. If no infection will be present, just blood, urologist
consult and cystoscopy
to rule out cancer should be done.
Please also increase mineral water intake and start cranberries supplementation.
Hope this will help. Feel free to ask further questions.