The symptoms that can accompany a UTI depend on the age of the individual and where in the body the infection is located.
Urethritis for example, is commonly felt as burning during urination. Usually the burning during urination occurs at the start of urination. Eventually though the bacteria that caused the inflammation is washed out with the fresh urine and thus relieves the inflammation.
If you are experiencing burning during the middle of urination, you are most likely dealing with cystitis. But, cystitis can also show up as nothing more than a fever as well, or even lower stomach pain, and lastly it can just show up as an unusual color or smell to your urine.
Often times the only sign that you will notice at first is blood in the urine. This can be the result of microscopic bleeding within the kidneys or it can be an abscess if the advancement of the infection is further along. You may also see blood appear when there is a bleed anywhere from the urinary meatus all of the way up to the kidneys. When you look at something like cystitis in particular, you will see that it usually results in bleeding in the bladder. That will almost always show the blood in the urine.
The reason why doctors and nurses ask what part of the urine stream the blood is appearing in, they are trying to find out the location in which the blood is entering the urine. By figuring out where the blood is entering the urine, they will then be able to tell if it is from the urethra, the kidneys, or even the bladder for example.
Pyelonephritis, or an infection in the kidneys, can also be felt as pain in your lower back or in your lower abdomen, since your kidneys are located in your lower back just under your ribs. It is common to have a fever that comes along with the pain as well, but that is not always the case. If it is a severe case, you may start to see symptoms common with kidney malfunction as well.