Not all burning with urination (called dysuria) signals a bacterial urinary tract infection, as is often assumed by both the public and health care providers. Several common sexually transmitted infections, such as herpes and chlamydia, can also cause burning. Dysuria can occur if there is infection inside the urethra [internal dysuria), or when there are sores or breaks in the skin around the urethra [external dysuria). A medical evaluation is necessary to sort out these possibilities.
Chlamydia and gonorrhea. These common sexually transmitted bacteria can cause infection of the urethra as well as the cervix. Sometimes, the only symptom a woman may notice with gonorrhea or chlamydia is burning with urination. Some of the other symptoms of these infections—such as discharge, spotting between periods, or pelvic pain—may or may not be present. (Sometimes these infections cause no symptoms at all.) A urine sample will show pus cells, as with a routine bladder infection, but a culture of the urine for bacteria commonly associated with urinary tract infections will be negative. Special tests must be done for gonorrhea and chlamydia.
Herpes. Herpes outbreaks may occur in the urethra and cause burning with urination. If the herpes outbreaks are on the vulva, the woman may experience burning when urine hits the lesions. Thus, herpes can cause both internal and external dysuria. Other symptoms of herpes outbreaks are itching or tingling in the genitals, a discharge, swollen lymph nodes in the groin, pain in the back of the legs, and flulike symptoms.
Urinary tract infection (UTI). Because in women the openings of the urethra, the vagina, and the anus are so close together, infection of the urethra by bacteria that are commonly present in these other areas occurs fairly easily. Other symptoms of a UTI are increased frequency of urination and lower back pain. Wiping back to front instead of front to back after urinating or defecating can cause an infection of the urethra and. bladder; sexual intercourse can also move bacteria from the anal area to the urethra. About one-third of women will get a bacterial UTI in their lifetime. The best way to test for a UTI is to evaluate the urine for white blood cells and culture the urine for bacteria. A UTI may progress and cause infection of the kidneys, called pyelonephritis. Symptoms of this infection include fever, chills, nausea, vomiting, and upper back pain.
Vulvar and vaginal irritation. Anything that causes vaginal and vulvar irritation—such as yeast and trichomonas infections, or allergic reactions to latex or spermicide—may cause burning when urine hits these areas.
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