Yes, mkh9 is very on the money in suggesting lots of water, something I forgot to mention. Flushing the urinary tract is essential to treatment.
Yes it is possible. You can get a urinary tract infection and it can spread to the kidneys and into the blood stream for example. So, it is important to get this treated with antibiotics. Sometimes you can clear the infection early on, if you drink large amounts of cranberry juice and water. If the organism happens to be one that has virulence factors or toxins it would be more likely to spread and cause sepsis. As was said in other posts, sepsis can be life threatening.
mkh9
Sepsis is called a systemic inflammatory response syndrome. It can indeed be life-threatening. A urinary tract infection may resolve on its own, or at least become encapsulated and go into remission, but the possibility is there for the infection to migrate to the bloodstream. There is usually a co-factor, such as a depressed immune system. Bear in mind that a urinary tract infection may result from any one of several varieties of bacteria. Some of these critters are more dangerous than others. In some cases something as simple as drinking fresh cranberry juice and reinforcing your immune system with vitamin C and D3 can be sufficicient to solve the problem. In other cases medication may be necessary. Thus, it is prudent to see a physician as soon as possible and follow his/her recommendations for treatment. In sepsis, death often results not from the bacteria themselves, but from the toxic products (from killed bacteria) discharged into the bloodstream when such infections are treated with antibiotics.
In some cases, a urinary tract infection may lead to an infection in the bloodstream (sepsis) that can be life-threatening.