If you have a suspected kidney stone and a fever or shaking chills, seek emergency medical care now. These infected kidney stone symptoms can signal that a stone is blocking urine flow while infection is present. This combination can become life-threatening; antibiotics may be needed, but a blocked, infected kidney often also needs urgent drainage.
Why A Stone And Infection Together Are Dangerous
A stone can cause intense pain, blood in your urine, nausea, or urinary symptoms that may feel like a UTI. Fever or chills raise a different concern: infection may be affecting the kidney or trapped urine above a blockage. If infected urine cannot drain, the infection can spread into the bloodstream.
Not every kidney stone is an emergency, and pain alone does not mean you have an infection. But do not try to decide at home whether a fever is “just part of” a stone. The American Urological Association (AUA) and European Association of Urology (EAU) recommend urgent drainage, as well as antibiotics, when infection occurs with an obstructing stone.
Infected Kidney Stone Symptoms That Need Emergency Care
Go to an emergency department or, in the UK, an accident and emergency (A&E) department if you have a suspected stone with any of these signs:
- A measured fever or shaking chills
- Flank or back pain with feeling feverish or seriously unwell
- Repeated vomiting or difficulty keeping fluids down
- Faintness, confusion, marked weakness, or passing much less urine than usual
Call your local emergency number if you are confused, faint, hard to wake, or rapidly getting worse. Do not wait for a routine appointment or for a stone to pass. A fever can have other causes, and symptoms alone cannot confirm an infected obstruction—but this combination needs prompt assessment.
How Clinicians Check For Infection And Blockage
Clinicians will assess your vital signs and may test your urine for signs of infection and send a sample for culture to identify bacteria. Blood tests can check for signs of infection and how well your kidneys are working. Imaging helps show whether a stone is blocking urine flow and causing swelling in the kidney. Depending on your situation and local practice, imaging may include ultrasound or a CT scan.
Tell the care team when your symptoms began, whether you have measured a temperature, how much you are urinating, and whether you have had stones or kidney problems before. A person with one functioning kidney or reduced kidney function may need especially careful assessment.
Why Antibiotics Alone May Not Be Enough
Antibiotics treat bacteria, but they do not open a blocked ureter. When infection sits behind an obstruction, clinicians may need to drain the kidney urgently as well as start antibiotics—often through a vein in hospital. Drainage is usually done with a thin tube called a ureteral stent, placed internally from the bladder toward the kidney, or a nephrostomy tube, which drains urine through the skin from the kidney. The team chooses an approach based on your condition, anatomy, and available resources.
A 2026 nationwide US inpatient analysis, Early urinary decompression and mortality in septic obstructing ureteral stones, led by Mohamed Mahmoud Dogha of Fayoum University in Egypt and colleagues, examined records for 9,172 adults with sepsis or septic shock and obstructing ureteral stones from 2016 to 2022. Decompression was associated with lower in-hospital mortality than conservative care, and drainage after 24 hours was associated with higher mortality than earlier drainage. Because this was an observational analysis of US hospital data, it cannot prove that timing alone caused the difference, but it supports treating the condition as time-critical.
Stone Removal Usually Comes After The Emergency
The first priority is to control infection and relieve the blockage. The stone may be removed or broken up later, once your condition has improved. There is no single fixed timetable for that follow-up procedure; the treating team considers your recovery and test results. If you are being treated for a suspected stone infection, ask whether imaging has confirmed drainage and what the plan is for definitive stone treatment.
If fever or chills accompany suspected kidney-stone pain, get urgent medical assessment today. This article cannot diagnose the cause of your symptoms; a clinician can assess you and decide what treatment is needed.
