| There are three different types of UTIs that can be caused by several factors. The most common are urethritis and cystitis, which often occur together. Pyelonephritis is less common, although it is more serious. If you have any of the following symptoms, you should contact your doctor. |
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| TYPE OF INFECTION | | | SYMPTOMS |
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| Infection of the urethra (urethritis) | | | Pain or burning sensation when urinating.
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| Bladder infection (cystitis) | | | Pain or burning sensation when urinating. |
| | | Frequent urination |
| | | Urgent need to urinate, but little urine is passed. |
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| Kidney infection (pyelonephritis) | | | Fever |
| | | Bloody or cloudy urine |
| | | Chills |
| | | Nausea |
| | | Back pain |
| | | Vomiting |
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| NOTE: Some sexually transmitted diseases (STDs), such as gonorrhea and chlamydia, are a possible cause of these symptoms and may be mistaken for a simple UTI. It is very important that you see your doctor for a diagnosis to be sure. |
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 | | | Your urinary tract consists of upper and lower tracts. The kidneys and ureters are in the upper tract. The kidney produces urine, which is carried by the ureters to the bladder. In the lower tract are the bladder, which stores urine, and the urethra, which is a hollow tube-like structure that carries urine out of the body. 90% of UTIs occur in the lower urinary tract. |
