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Are You Experiencing Sudden, Severe Side Pain? It Could Be Renal Colic!

Dr. Priya Sammani (MBBS)
Medically Reviewed by Dr. Priya Sammani (MBBS) ✓ Medically Reviewed
📅 Updated: Oct 19, 2026 • ⏱ 13 min read • Editorial Policy
Are You Experiencing Sudden, Severe Side Pain? It Could Be Renal Colic!
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Have you ever experienced a sudden, sharp pain just below your ribs on one side of your body? This intense ache can sometimes spread down to your back, groin, or lower belly, often leaving you feeling sick to your stomach or vomiting. Many people face this frightening health event, which doctors call renal colic. Do not let the medical name worry you. It simply means severe pain caused most of the time by a kidney stone trapped in your urinary tract. Let us explore this condition together in simple, clear detail so you know what is happening inside your body.

Understanding renal colic helps you take control of your health and seek the right help quickly. Whether you are dealing with this pain right now or simply want to protect your kidneys, knowing the signs makes all the difference. Let us walk through everything you need to know about renal colic, from everyday causes to modern medical treatments.

Key Takeaways for Your Health.

  • Renal colic causes sharp, waves of severe pain in your side, back, or groin area.
  • Kidney stones blocking your urinary tract are the most common cause of this pain.
  • Drinking plenty of water every day is your best defense against forming stones.
  • Mild pain responds well to basic medicine, but severe pain needs a doctor right away.
  • Fever or chills alongside your pain mean you must seek emergency medical help right away.
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What Is Renal Colic?

Simply put, renal colic is the severe pain that happens when a solid stone gets stuck in your urinary system. Your urinary system includes your kidneys, your ureters (the small tubes carrying urine from your kidneys to your bladder), and your bladder. Sometimes, other issues like infections, sudden muscle cramps, or narrowed urinary tubes can also cause this exact type of pain.

How do these stones form inside your body? Minerals and other substances in the food and drinks you eat can join together and stick into tiny crystals. These crystals can grow into stones anywhere in your urinary system. When they form in your kidneys, doctors call them kidney stones. When they move into your ureters, they are ureteral stones. The size of the stone and where it gets stuck decide how much pain you will feel. Some stones are as tiny as a grain of sand. This others can grow as large as a golf ball. Imagine a tiny tube trying to pass a hard rock, and you will understand why it hurts so much.

How Common Is Renal Colic?

This condition is actually much more common than most people think. Medical statistics show that between 5% and 15% of people around the world will experience renal colic at some point in their lives. That means millions of people face this intense pain every year, making it a well-known challenge in medicine.

Can You Get Renal Colic Without Stones?

Yes, you certainly can. Sometimes, the smooth muscles in your ureters or your bladder suddenly tighten up into strong spasms without any stone present. When these muscles cramp tightly, they create a burning, twisting pain that feels very similar to passing a stone. This spasm can happen whether you have a kidney stone or not.

What Are the Symptoms of Renal Colic?

The main sign of renal colic is severe pain in your flank, which is the area between your lower ribs and your hip bone. This pain often comes in waves rather than staying at the same level all day. It builds up, peaks, eases slightly, and then crashes back over you. The pain can travel around to your lower back, groin, or lower belly. Along with this agony, many people feel sick to their stomachs and start vomiting.

In addition to the main side pain, you might notice several other warning signs:

  • Burning or sharp pain when you try to pass urine.
  • Blood in your urine, making it look pink, red, or brownish.
  • Urine that looks cloudy or murky.
  • Changes in bathroom habits, such as a foul smell, going much more often, or struggling to pass any urine at all.
  • Tiny crystal specks visible in your urine stream.
  • sudden fever.
  • Body chills and shivering.

Important: If you notice one or more of these symptoms, you should schedule a visit with your doctor right away to protect your kidneys.

What Causes Renal Colic?

The primary trigger is a kidney stone blocking the normal flow of your urine. When urine cannot flow past the blockage, pressure builds up quickly. This pressure causes swelling and irritation in your urinary tract, which triggers intense pain signals to your brain.

Several everyday factors increase your chances of forming kidney stones:

  • Not drinking enough water: This is the most common cause. Low water intake makes your urine concentrated, allowing minerals to clump together.
  • High calcium levels in your urine: Your body may naturally release more calcium than normal through your kidneys.
  • Eating too much protein: Diets loaded with animal protein raise your risk of stone formation.
  • Certain medicines: Taking specific drugs over a long period can sometimes encourage stone growth.
  • Digestive system diseases: Conditions like Crohn disease or ulcerative colitis make your body absorb substances differently, raising stone risks.
  • Hyperparathyroidism: This is a medical condition where your parathyroid glands become overactive and alter your body mineral balance.

If tests show that your pain is not caused by stones, your doctor may refer you to a urologist. A urologist is a medical specialist who focuses entirely on the urinary system and can run advanced tests to find the true root cause.

How Do Doctors Diagnose Renal Colic?

When you visit a doctor, they will examine you carefully, ask about your symptoms, and review your personal and family medical history. To confirm a diagnosis of renal colic and locate the blockage, doctors use several reliable medical tests:

  • A computerized tomography (CT) scan of your urinary tract, which gives clear cross-sectional images.
  • A kidney ultrasound to check for blockages using safe sound waves.
  • An abdominal X-ray to spot mineral deposits.
  • A specialized renal scan to see how well your kidneys are filtering and working.

These modern tests reveal if a stone is present, exactly where it sits, and how large it has grown.

What Is the Best Pain Reliever for Kidney Stones?

If your pain is mild, standard over-the-counter medicines like acetaminophen, ibuprofen, or naproxen sodium may provide enough relief. However, if the pain is severe, your doctor will prescribe stronger pain medicine. If your pain stems from muscle cramps in your urinary tubes, your doctor may also give you a muscle relaxant to calm those spasms down.

How Do Doctors Treat Renal Colic?

Your treatment plan depends entirely on the specific type of stone causing your blockage. Kidney stones fall into four main categories:

  • Calcium stones: Formed from calcium oxalate or calcium phosphate, these are the most common type people get.
  • Uric acid stones: These form when your urine contains too much acid.
  • Struvite stones: These large stones can form quickly following urinary tract infections.
  • Cystine stones: These rare stones result from a genetic disorder called cystinuria that makes your kidneys leak a specific amino acid.

The physical size of your stone also guides your doctor in choosing the best treatment approach.

Treatments for Small Stones.

If you have a small stone, your body can often push it out naturally through your urine. Drinking large amounts of water helps flush it along. Your doctor will give you medicine to control the pain while you wait. They may ask you to pee through a special straining device so you can catch the stone. Sending that captured stone to a lab lets experts test its exact material makeup.

Treatments for Large Stones.

Larger stones rarely pass on their own because they are too big for your urinary tubes. In these cases, your doctor will recommend a medical procedure to break up or remove the stone:

  • Shock wave lithotripsy: This technique uses high-energy sound waves directed from outside your body to smash the stone into tiny sand-like fragments. Your body then flushes these tiny pieces out easily in your urine.
  • Ureteroscopy: Your surgeon passes a thin, lighted tube with a tiny camera through your urinary opening up to the stone. They can then grab the stone or break it apart with specialized tools.
  • Percutaneous nephrolithotomy: Doctors use this surgery for very large stones inside the kidney. They make a tiny cut in your back and insert instruments directly into the kidney to remove the stone safely.
  • Ureteral stent placement: Sometimes, doctors place a tiny hollow tube inside your ureter to prop the passage open, relieving pressure and helping stones and urine flow past.

In complex cases, doctors may need to perform more than one procedure to clear all the stones from your system.

Can You Prevent Renal Colic?

Yes, you can take active steps to lower your risk. Preventing renal colic means stopping kidney stones before they form. Follow these practical daily habits to protect your urinary health:

  • Drink plenty of water: Aim for 2 to 3 liters of water every day. Staying well-hydrated is vital, especially if you live or work in warm climates. Limit dark sodas and sugary carbonated drinks.
  • Cut back on salt: Keep your daily salt intake below 2 grams (about 2,000 milligrams), which is less than a single teaspoon.
  • Moderate your animal protein: Keep servings of meat, chicken, pork, and fish to a reasonable palm-sized portion per day.
  • Manage oxalate-rich foods: Foods like spinach and certain nuts contain high levels of oxalates, so enjoy them in moderation.
  • Do not cut out calcium: Many people mistakenly stop eating dairy because they think calcium causes stones. This is false. Your body needs calcium from healthy foods like milk, cheese, yogurt, and beans to stay strong.

If you have a history of frequent stones, your doctor may prescribe specific medicines like potassium citrate or thiazide diuretics to keep your urine chemistry balanced and prevent future stones.

What to Expect When You Have Renal Colic.

If you suspect you are having an episode of renal colic, seek medical care right away. A doctor will run tests to find the true source of your discomfort. Once they know what is causing the blockage, they can clear the stone and prescribe treatments to soothe your symptoms fast.

How Long Does Renal Colic Pain Last?

When a pain wave hits during renal colic, it usually lasts anywhere from 20 to 60 minutes. In severe cases, the waves can drag on much longer. If your pain is unbearable and refuses to fade, head straight to the nearest emergency department for immediate care.

Does Kidney Stone Pain Feel Like a Muscle Spasm?

In many ways, yes, it can feel that way. Once a stone slips out of your kidney, your urinary tract tries hard to push it out, causing the surrounding muscles to cramp and contract tightly. This creates a sharp, twisting sensation mixed with the intense side and back pain.

How Do You Stop Ureter Spasms?

Doctors can prescribe specialized medicines, such as tolterodine, to calm down muscle spasms in your urinary tubes. Some people also find that gentle pelvic floor exercises help relax the pelvic region and ease overall discomfort.

When Should I See a Doctor?

Schedule an appointment with a doctor right away if you feel pain starting in your side and spreading toward your back, groin, or lower belly. A doctor can quickly determine whether renal colic or another medical issue is causing your distress and provide fast-acting relief medicine.

Is Renal Colic a Medical Emergency?

While renal colic pain is severe, uncomplicated renal colic is rarely life-threatening on its own. However, if your renal colic comes with signs of an infection, it becomes an emergency. If you develop a fever or body chills along with your pain, call emergency services right away or go to the nearest hospital emergency department. This is a critical safety rule.

Condition Aspect. Mild / Managed at Home. Severe / Emergency Room.
Pain Intensity. Mild aches that come and go in manageable waves. Unbearable pain lasting over an hour without relief.
Associated Signs. Mild nausea or slight burning during urination. High fever, persistent vomiting, and uncontrollable shaking.
Action Required. Schedule a doctor visit, drink water, and rest. Call 911 or 999 or visit the nearest ER right away.
❓ FAQ

Frequently Asked Medical Questions (FAQ)

Evidence-based clinical answers to common patient questions

What does renal colic pain actually feel like?

Renal colic feels like an intense, sharp ache in your side and back just below your ribs. This pain often comes in severe waves that can radiate down toward your groin or lower belly. Many people describe it as one of the worst pains they have ever experienced.

Can a kidney stone pass on its own without surgery?

Yes, many small kidney stones pass naturally on their own. Drinking plenty of water helps flush them through your urinary system. Your doctor can provide pain relief medicine while you wait for the stone to pass.

How much water should I drink to prevent kidney stones?

You should aim to drink 2 to 3 liters of water every day. Staying well-hydrated keeps your urine diluted, which stops minerals from clumping together into stones. This is especially important in warm weather.

When should I treat renal colic as an emergency?

Renal colic becomes an emergency if you develop a fever, body chills, or uncontrollable vomiting alongside your pain. These signs point to an infection that requires immediate hospital care. Call 911 or 999 right away.

Do I need to avoid calcium to stop getting stones?

No, you should never cut calcium out of your diet. Your body needs calcium from healthy foods like milk, yogurt, and vegetables to stay strong. Eating balanced amounts actually helps protect against certain types of stones.

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