Kidney infections are no joke, and it can be easier than you might think to get one. Many people mistake the early signs of a kidney infection for something less serious, like a bladder infection or even a yeast infection. It is important to pay attention to your body, because a urinary tract infection can quietly progress into a kidney problem, and in serious cases even kidney failure.
Keep reading to learn more about when to go to the hospital for a kidney infection, how to identify one, and the complications it can cause if it goes untreated. Knowing the warning signs ahead of time can help you act quickly instead of waiting until the pain becomes unbearable.
What is a Kidney Infection?
A kidney infection is technically a form of UTI, since the kidneys are part of your upper urinary tract. Infections are typically caused by E. coli bacteria, which naturally lives in the intestines. When this bacteria makes its way into the urinary tract, it can cause serious problems fairly quickly, sometimes within just a day or two of the initial exposure.
Because the symptoms overlap so much, many people confuse a kidney infection with a bladder infection, which is far less serious. Knowing the difference matters, since a kidney infection needs faster and more aggressive treatment.
Causes of Kidney Infections
Various things can lead to a UTI, and most cases start with E. coli bacteria accidentally making its way into the urinary system. That said, there are a few other paths that can lead to the same result.
Bacterial Infection
E. coli bacteria infections are the most common culprit behind UTIs. This bacteria naturally lives in the colon and can be introduced to the urethra through sexual intercourse, using the bathroom, or other everyday means. Wiping from front to back after using the bathroom helps reduce the chance of introducing bacteria to the urethra in the first place. Staying hydrated throughout the day also helps flush bacteria out before it has a chance to travel upward toward the kidneys.
Kidney Stone
Kidney stones and other blockages can cause a UTI by making a urine pool above the blockage, which backs the fluid up into the tube inside the kidney and causes the organ to swell. A kidney stone raises your risk for UTIs, so it helps to know what a kidney stone related ER visit actually looks like if you already have a history of stones. Paying close attention to your body makes it easier to catch either condition early and get treated before it worsens.
Enlarged Prostate
Similar to a kidney stone, an enlarged prostate can cause a UTI by blocking the normal flow of urine from the bladder. Enlarged prostates are common in men over the age of 40, which makes regular checkups an important part of catching this cause early. Left unaddressed, the blockage can lead to repeated infections over time, and in some cases can also raise the risk of kidney stones forming as urine sits longer than it should.
Sexually Transmitted Infections
STIs such as chlamydia, herpes, and gonorrhea can all cause symptoms that mimic or directly cause a UTI. If you are sexually active and think you may have been exposed to an STI, or you start noticing related symptoms, get tested right away so it can be treated or managed properly. Waiting too long can allow the infection to spread further into the urinary tract.
Who Is at Higher Risk for a Kidney Infection?
Anyone can develop a kidney infection, but certain groups face a higher chance of running into one. Knowing whether you fall into one of these categories can help you catch symptoms earlier rather than dismissing them as a minor bladder issue.
Anatomy and Age
Women face a higher overall risk because of a shorter urethra, which gives bacteria a shorter distance to travel to reach the bladder and kidneys. Older adults are also more vulnerable, partly because immune function naturally declines with age and partly because other health conditions can mask early symptoms. Young children are at risk too, especially if they have structural issues with their urinary tract that make infections more likely to recur. Pregnant women also face a higher risk, since hormonal changes can slow the flow of urine and make it easier for bacteria to linger.
Underlying Health Conditions
People living with diabetes face a higher risk since elevated blood sugar can make it easier for bacteria to thrive in the urinary tract. A weakened immune system, whether from an illness or certain medications, also makes it harder for your body to fight off an infection before it spreads to the kidneys. Anyone with a history of frequent UTIs should pay especially close attention to new or worsening symptoms, since repeat infections tend to progress faster each time.
Signs of a Kidney Infection
If a UTI goes untreated, a kidney infection becomes almost inevitable. Cloudy, bloody, dark, or foul smelling urine are all signs worth paying attention to, along with frequent and painful urination.
Physical Symptoms to Watch For
A kidney infection can cause a combination of symptoms that typically become more severe as the infection progresses. Common warning signs include:
- Fever and chills: A high fever with chills often indicates that the infection has spread beyond the bladder.
- Back, side, or flank pain: Pain near the kidneys is a common sign of a kidney infection.
- Nausea and vomiting: These symptoms frequently accompany more advanced urinary tract infections.
- Persistent urge to urinate: You may feel like your bladder is never completely empty, even immediately after urinating.
- Symptoms that worsen quickly: Kidney infections can progress rapidly, so symptoms that develop suddenly or become noticeably worse within a day or two should be evaluated promptly.
These symptoms can signal that the infection is affecting the kidneys and may lead to serious complications if left untreated. Seeking medical care early can help prevent kidney damage and other potentially severe outcomes.
Should You go to Hospital for a Kidney Infection?
UTIs can lead to serious complications, which is why it matters to seek medical advice as soon as symptoms appear. If a UTI goes untreated and the infection spreads, your body can enter a state called sepsis, which is an extreme and potentially life threatening response to infection.
What Happens if It Is Left Untreated
Even if your infection does not progress to sepsis, you could end up dealing with a lifetime of chronic kidney issues. A fever that keeps climbing, especially in a child or an older adult, is one of the clearer signals that it is time to treat a fever as an emergency rather than something to manage at home. Visiting an emergency room as soon as possible gives a doctor the chance to start you on a course of antibiotics before complications set in.
Getting a Fast and Accurate Diagnosis
An ER visit for a suspected kidney infection typically includes a urine test, bloodwork, and sometimes imaging to check for stones or other blockages. Catching the early symptoms of a kidney infection before they progress gives you a much better shot at a quick recovery with antibiotics alone. Waiting too long narrows your treatment options and increases the odds of a hospital stay, and in more severe cases it can mean needing IV antibiotics rather than a simple oral prescription.
Preventing Future Kidney Infections
Once you have dealt with a kidney infection, taking a few extra precautions can help lower your risk of a repeat episode. Small daily habits often make a bigger difference than people expect.
Everyday Habits That Help
Drinking plenty of water throughout the day helps flush bacteria out of your urinary tract before it has a chance to travel upward. Urinating soon after sexual activity and avoiding holding your urine for long stretches both reduce the chance of bacteria settling in. Wiping from front to back and choosing breathable underwear are simple habits that add up over time. Cutting back on bladder irritants like excess caffeine and alcohol can also help keep your urinary tract healthier overall.
When to Follow Up With a Doctor
If you have dealt with more than one kidney infection in a short period, it is worth talking to a doctor about further testing. Recurrent infections sometimes point to an underlying issue, such as a kidney stone or a structural problem, that needs its own treatment plan. Addressing the root cause can save you from repeating the same painful cycle over and over again.
Visit Village Emergency Centers
At Village Emergency Center, we are equipped to handle all types of emergencies, 24 hours a day, 7 days a week. If you think you might be dealing with a UTI, a kidney infection, or another urgent health concern, our team is ready to help you get answers quickly. Board certified physicians, on-site labs, and imaging mean you get a clear diagnosis without being sent somewhere else for testing.
If you are near Clear Creek, walk in anytime or give us a call ahead of your visit so we can prepare for your arrival.
Village Emergency Center has locations throughout the Greater Houston area with little to no wait and transparent billing, so you always know what to expect before you walk through the door.