What Are The Signs Of A UTI (Urinary Tract Infection) Dear BeingGirl Experts, What's the most tell-tale sign that you have a UTI? What causes them? Terry --- Dear Terry, There are two types of urinary tract infections (UTI)...Lower UTI, sometimes called cystitis, and Upper UTI. Both need to be diagnosed by your doctor/health care provider. Cystitis occurs when bacteria work their way up the urethra to infect the bladder. If you feel a burning sensation while urinating and frequent urges to urinate (with little output) you may have this type of UTI. Possible causes include sexually-transmitted diseases, irritation from sexual intercourse, an allergic reaction to soap, spermicide, bubble bath, etc. A lower tract infection, if left untreated may become an upper tract UTI. Upper UTI affects the ureters and the kidneys. This infection, known as pyelonephritis, requires immediate medical care. Symptoms are stronger than those of cystitis and include back pain, fever, chills, nausea and vomiting. This is a very serious disorder that can lead to other infections. If you suspect you have a UTI a visit to your doctor/health care provider is important. Hope this is helpful, Your BeingGirl Experts Learn about signs of a UTI and get answers to your health questions at BeingGirl.com.