Kidney stones often cause sudden side or back pain, blood in urine, nausea, and burning or frequent urination.
Kidney stones can stay quiet while they sit in the kidney. Trouble starts when a stone shifts into the ureter, the narrow tube that drains urine to the bladder. Then pain can hit hard. It may come in waves, change spots, and leave you pacing because sitting still does not feel good.
That pattern is one of the clearest clues. Many people notice pink, red, or brown urine, a sharp sting while peeing, a constant urge to go, or only passing a small amount. If fever or chills join the picture, do not wait it out.
What Are The Signs And Symptoms Of Kidney Stones?
The most common signs and symptoms cluster around pain, urine changes, and stomach upset. Some show up all at once. Others arrive as the stone moves.
Pain That Starts In The Side Or Back
Classic kidney stone pain often starts below the ribs on one side. Many people call it sharp or stabbing. It may spread into the lower belly, groin, or genitals as the stone drops lower in the urinary tract. The pain can rise, ease, then surge again a few minutes later.
Blood And Other Urine Changes
Blood in urine is common. Sometimes the urine looks pink or tea-colored. Sometimes the blood is too small to see and only shows up on a test. You may notice cloudy urine, a foul smell, burning when you pee, or the feeling that you still need the bathroom right after you went.
Nausea, Vomiting, And Restlessness
Kidney stone pain often goes hand in hand with nausea or vomiting. Your stomach may turn with it. A lot of people feel restless too. They shift positions because no position feels right for long.
Fever, Chills, And Low Urine Output
These signs should make you move faster. Fever and chills can point to an infection. Trouble peeing, or only letting out a trickle, can mean urine flow is blocked. Both need same-day medical care.
- Sharp pain in the side, back, lower belly, or groin
- Pain that comes in waves and may travel downward
- Pink, red, or brown urine
- Burning while peeing
- Constant urge to pee
- Only passing a small amount of urine
- Cloudy or bad-smelling urine
- Nausea or vomiting
- Fever or chills
| Symptom | What It Often Feels Like | What May Be Happening |
|---|---|---|
| Side or back pain | Sharp pain below the ribs on one side | A stone may be stretching or blocking the urinary tract |
| Wave-like pain | Pain rises, eases, then hits again | The ureter may be squeezing around a moving stone |
| Pain moving to the groin | The sore spot shifts lower over time | The stone may be traveling toward the bladder |
| Blood in urine | Pink, red, brown, or rusty urine | The stone may be scraping the lining of the tract |
| Burning while peeing | Sharp sting or heat at the start or end of urination | The stone may be near the bladder or urethra |
| Frequent urge to pee | You keep feeling you need the toilet | The lower urinary tract may be irritated |
| Small urine output | Only a trickle comes out | A blockage may be slowing urine flow |
| Cloudy or foul-smelling urine | Urine looks murky or smells off | Irritation or infection may be present |
| Nausea or vomiting | Upset stomach with pain spikes | The body is reacting to severe pain |
| Fever or chills | You feel hot, shaky, or chilled | An infection may be linked to the stone |
The pattern above lines up with the NIDDK symptom list, which names sharp pain, blood in urine, urinary changes, nausea, vomiting, fever, and chills as common clues.
Kidney Stone Symptoms By Location And Severity
Where the stone sits can change what you feel. A stone that stays in the kidney may cause little or no trouble. Once it drops into the ureter, severe pain is more likely. Near the bladder, burning and frequent urination may stand out more than back pain.
Stone size matters, though not in a simple way. A tiny stone can cause fierce pain if it lodges in a tight spot. A larger stone may stay quiet until it blocks urine flow. That is why the pattern matters more than size guesses made at home.
When A Stone Causes No Symptoms
Some stones are found by accident during a scan for another reason. You may have no pain at all until the stone starts moving.
When A Stone Starts To Block Urine
This is when many people get the classic attack. The pain builds in waves and the sore spot may shift from the side to the lower belly or groin. Blood in urine, nausea, vomiting, and a hard-to-ignore bathroom urge often pile on.
The MedlinePlus kidney stone overview flags pain that will not go away, blood in urine, fever, chills, vomiting, foul-smelling or cloudy urine, and burning with urination as signs that need a doctor’s help.
When To Get Medical Help Fast
Do not try to tough out every stone at home. Some attacks can be watched with pain relief and fluids after a clinician checks you. Others need same-day care.
- Go now if you have fever or chills with stone symptoms.
- Go now if the pain is severe and does not let up.
- Go now if you cannot keep fluids down because of vomiting.
- Go now if you cannot pee, or only a small trickle comes out.
- Go now if the urine looks bloody and the pain is rising fast.
The NIDDK treatment page notes that larger stones, stones that block the urinary tract, or stones that cause great pain may need urgent treatment.
| Symptom Pattern | What It May Suggest | What To Do Today |
|---|---|---|
| Wave-like side pain with no fever | A stone may be moving through the ureter | Get checked soon, even if pain eases |
| Pain plus visible blood in urine | The tract may be irritated by the stone | Seek care the same day |
| Burning and constant urge to pee | The stone may be low in the tract | Get checked, especially if pain is rising |
| Cloudy or foul-smelling urine | Irritation or infection may be present | Get care the same day |
| Fever or chills with pain | A blocked tract with infection is possible | Go for urgent medical care now |
| Vomiting and low urine output | Dehydration or blockage may be building | Go for urgent medical care now |
What Doctors Check After Symptoms Start
Symptoms can raise suspicion, but they do not prove a stone on their own. Doctors usually pair your story with urine tests, blood work, and imaging. A scan can show where the stone is and whether urine is backing up behind it.
If you pass the stone, the doctor may ask you to catch it. That lab check can show what the stone is made of. That matters because calcium oxalate, uric acid, struvite, and cystine stones do not all behave the same.
What Kidney Stone Pain Gets Mistaken For
Not every sharp side pain is a kidney stone. A urinary tract infection, a pulled muscle, appendix trouble, gallbladder trouble, ovarian pain, or testicular pain can overlap with the same symptoms. Blood in urine can happen with more than one illness too.
That overlap is why fever, vomiting, or trouble peeing should never be brushed off as “just a stone.” If the pain feels new, severe, or hard to place, get checked instead of trying to guess.
A Simple Symptom Checklist Before Your Visit
If you are on the way to urgent care or calling your clinic, it helps to track a few details. A quick note on your phone is enough.
- When the pain started
- Where the pain started and where it moved
- Whether the pain came in waves or stayed steady
- Any blood, cloudiness, or odor change in the urine
- Any burning, urgency, or low urine output
- Any nausea, vomiting, fever, or chills
- Whether you have had kidney stones before
Those details can speed up the workup and make it easier to sort out a moving stone from an infection or another cause of abdominal pain. Kidney stones do not always start with one neat symptom. They usually show up as a cluster of pain, urine changes, and stomach upset, with fever, chills, or trouble peeing standing out as red flags.
References & Sources
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).“Symptoms & Causes of Kidney Stones.”Lists common kidney stone symptoms, including sharp pain, blood in urine, urinary changes, nausea, vomiting, fever, and chills.
- MedlinePlus.“Kidney Stones | Kidney Stone Symptoms | Nephrolithiasis.”Lists signs that need a doctor’s help and notes that diagnosis often uses urine tests, blood tests, and imaging.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).“Treatment for Kidney Stones.”Describes when larger or blocking stones may need urgent treatment and how doctors treat stones by size and location.