Kidney infection pain (pyelonephritis) often starts as a gradual, dull ache in the back or side (flank) that worsens over hours or days, unlike the sudden, sharp pain of kidney stones, and is usually accompanied by fever, chills, nausea, and urinary issues, requiring urgent medical attention. While it can start slowly, it becomes a steady, significant discomfort as the infection progresses.
Pain from the kidneys is often constant, or can be sharp, like being stabbed. Pain from the muscles or the spine comes on with bending over or with lifting, and may be felt in the middle of the back or on either side of the back. Infection- An infection in a kidney is called acute pyelonephritis.
You know your kidneys might hurt if you feel a deep, dull ache in your back or side, under the ribs, that doesn't improve with movement, often accompanied by nausea, fever, chills, painful/frequent urination, or changes in urine (cloudy, bloody). Unlike back pain, kidney pain is typically deep, constant, and not relieved by shifting or resting, potentially spreading to the groin, especially with stones or infection, and warrants a doctor's visit.
Symptoms of kidney infection in children
have blood in their pee. wet the bed. feel unwell with a high temperature.
It is caused by bacteria travelling from your bladder into one or both of your kidneys and causing an infection there. If it is treated early, there should be no serious harm. If it is left untreated, it can become worse and cause kidney damage. Most kidney infections are one off and come on quite quickly.
On average, it can take between a few days to a week for a UTI to turn into a kidney infection if left untreated. However, this timeline can vary depending on individual factors such as your general health, age, and the bacteria causing the infection.
Symptoms of a kidney infection
a high temperature. feeling or being sick. pain in your lower back or side. diarrhoea.
Pain in the back, side, lower abdomen, or groin can signal a kidney stone in a teenager or child.
To check for a kidney infection, you may be asked to provide a urine sample to test for bacteria, blood or pus in your urine. Your health care provider might also take a blood sample for a culture. A culture is a lab test that checks for bacteria or other organisms in your blood.
Signs and symptoms vary with age: Newborns: no fever but poor feeding and vomiting. Children <2: may have a fever (but not always), a poor appetite, vomiting and diarrhea. Children >2: fever, appetite changes, stomach or lower back pain, symptoms of urgency, frequency and pain with urination.
Dull or sharp pain in the low back (often confused for kidney pain) is more likely due to a muscle pull, spinal issue, such as sciatica, or an injury. Kidney pain is usually felt higher up in the back and very rarely that low.
See your doctor immediately or go to your local hospital emergency department if you have kidney pain and: you have a fever or feel very unwell. you are unable to pass urine. the pain is on both sides of your body.
How is kidney disease diagnosed in a child?
Kidney Pain: Kidney pain is often described as a constant, dull ache that doesn't change much with movement or position. It can also be sharp and severe, particularly if you have kidney stones or a kidney infection. The pain tends to be steady rather than coming and going with certain movements.
Nephritis occurs when parts of your kidney become inflamed (swollen). This swelling prevents the kidney from working properly to filter waste from the blood. Nephritis can be caused by infection, autoimmune or inflammatory conditions such as lupus, genetic disorders, or other conditions.
get plenty of rest - a kidney infection can be draining, even if you're healthy and strong. sit on the toilet seat when you pee - if you hover over the seat, your bladder cannot fully empty this way. drink plenty of fluids so your pee is pale, water is best - this helps to flush out the bacteria from your kidneys.
You should see your doctor if you have symptoms of a kidney infection, as you will usually need treatment with antibiotics. If you are very unwell, you may need to be treated in the emergency department or admitted to hospital for intravenous (IV) antibiotics.
Only a healthcare provider can diagnose you with a kidney infection. If you have symptoms of a urinary tract infection with fever and pain in your side, you might have a kidney infection.
If the kidneys are damaged or infected, a person can experience abnormal urination, including clear urination. They may also have other symptoms, such as painful urination or a fever.
Kidney disease can affect anyone at any age. Babies can be born with kidneys that haven't developed normally or don't function normally. Genetic alterations can result in kidney diseases developing during childhood or later in life. Other types of kidney disease can develop at any age.
You usually feel kidney pain on one side. A muscle strain that causes flank pain often worsens with certain movements, such as bending, twisting, lifting heavy weight, laughing or sneezing. Kidney pain doesn't usually get worse with movements.
And as kidney disease progresses, you may notice the following symptoms. Nausea and vomiting, muscle cramps, loss of appetite, swelling via feet and ankles, dry, itchy skin, shortness of breath, trouble sleeping, urinating either too much or too little.
Go to the hospital if you have severe kidney infection symptoms like high fever, severe pain, or confusion. Seek immediate medical care if you have symptoms of sepsis, like shaking chills or light-headedness.
Three key early warning signs of kidney problems are changes in urination (more or less frequent, especially at night), foamy or bloody urine, and persistent swelling, particularly around the eyes, feet, or ankles, indicating fluid retention. Other common signs include persistent fatigue, nausea, itching, and loss of appetite, as toxins build up when kidneys aren't filtering effectively.
Kidney stones can be tricky, since they may have many of the same symptoms as a UTI or a kidney infection – pain when urinating, needing to urinate often, and cloudy or strong smelling urine, blood in the urine, fever, nausea or vomiting.