What is the First Stage of a Kidney Infection?
The first stage of a kidney infection is typically a bladder infection that ascends to the kidneys. Scientists believe that most kidney infections begin this way. The infection is often caused by bacteria residing in the bowel. While the urinary tract has defenses against infection, these can sometimes be overcome.
A kidney infection, also known as pyelonephritis, doesn't have distinct numbered stages in the same way that chronic kidney disease (CKD) does. Instead, it's understood as a progression starting with a bladder infection (cystitis):
- Bladder Infection (Cystitis): This is the initial phase. Symptoms can include frequent urination, a burning sensation during urination, and sometimes cloudy or bloody urine. This is the crucial first step before a kidney infection develops.
- Ascension to the Kidneys: If left untreated, the infection can travel up the urinary tract to one or both kidneys.
- Kidney Infection (Pyelonephritis): Once the infection reaches the kidneys, more severe symptoms appear, such as fever, chills, back pain (often in the lower back or flank), and potentially nausea and vomiting.
Symptoms to Watch For
The symptoms mentioned above are key indicators. It’s vital to note that symptoms can vary, particularly in children. Infants may exhibit nonspecific symptoms.
- Early signs (often related to the preceding bladder infection): Frequent urination, burning during urination.
- Later signs (indicative of kidney involvement): Fever, chills, back pain, nausea, vomiting.
Seeking Medical Attention
If you experience symptoms suggestive of a urinary tract infection or kidney infection, seeking prompt medical attention is crucial. Early diagnosis and treatment prevent the infection from worsening and potential complications.
