“Other than a UTI what can be other causes of burning sensation while urinating?”

•Stones in the urinary tract.
•Irritation of the urethra from sexual activity.
•Interstitial cystitis, a condition caused by bladder inflammation.
•Vaginal changes related to menopause.
•Activities such as horseback riding or bicycling.

There are certain foods that cause burning with urination: caffeine, spicy food, acid foods, etc. There is a condition called interstitial cystitis that presents with symptoms of a uti but the cultures are neg. This can be diagnosed by a Urologist near you.

A number of conditions can cause burning with urination. Infectious causes can also include yeast. Up to 40% of modern-day bacteria can go undetected with standard culture media. Because of this, we tend to use DNA sequencing in our office to test urine in patients such as your wife. Results come back faster than routine cultures, are much more sensitive, and include yeast variants. Other factors include bladder stones, scar tissue in the urethra, urethral diverticulum, or even polyps, which can be cancerous. Chronic conditions such as Interstitial Cystitis often cause dysuria or burning with urination without any infection. Gynecologic issues such as post menopausal vaginal atrophy (or withering of the female genitals) can lead to discomfort in the urethral region. In rare cases, herpes zoster or “shingles” can cause burning type sensation. Often, those patients say their urine is “boiling.”
I hope this helps. Your wife may be best served seeing a local urologist to discuss her symptoms and do more testing.