Kidney Stones What You Need to Know About This Common Condition
Kidney stones form when minerals crystallize in urine, causing intense pain and urinary symptoms. Get clear next steps, labs, and no-referral support.
Kidney stones are hard crystals that form in your urine and can get stuck as they move through your urinary tract, which is why they can cause sudden, severe pain. The good news is that many stones pass on their own, and there are clear ways to control pain, check for infection or blockage, and prevent the next one. Stones are common, and they can happen even if you “eat pretty well.” What matters most is how concentrated your urine gets, your personal chemistry, and whether you have risk factors like dehydration, certain diets, or a past stone. Below you’ll learn what kidney stone pain typically feels like, when symptoms mean you should get urgent care, how doctors confirm a stone, and what treatments are used depending on size and location. If you want help sorting symptoms and next steps in real time, PocketMD can walk you through what’s most likely and what to do next. And if your clinician recommends lab work to look for causes, VitalsVault lab options can make it easier to get baseline testing and follow-up.
Symptoms and signs of kidney stones
Sudden flank or back pain
Kidney stone pain often starts on one side of your back or just under your ribs, and it can come in waves as the ureter squeezes around the stone. It may feel impossible to get comfortable, which is a clue that it is not a typical muscle strain. The pain can shift lower as the stone moves.
Pain that moves to your groin
As a stone travels down the tube from your kidney to your bladder, you might feel pain spread toward your lower belly, groin, or even your testicle or labia. That “moving target” pattern happens because the irritation is changing location inside your urinary tract. It can be scary, but it is a classic kidney stone story.
Blood in your urine
You might see pink, red, or tea-colored urine, or you might only find blood on a urine test. This happens because the stone can scrape the lining of the urinary tract on the way through. Even a small amount of blood is worth mentioning, especially if it is new for you.
Burning and frequent urination
When a stone gets close to your bladder, it can make you feel like you need to pee constantly, and it can sting when you do. This can mimic a urinary tract infection, which is why testing matters. If you also have fever or feel very ill, treat that as urgent because infection plus a blocked urinary tract can become dangerous quickly.
Nausea, vomiting, or sweats
Severe pain can trigger nausea, vomiting, and cold sweats because your nervous system is on high alert. Vomiting also makes dehydration more likely, which can worsen pain and make it harder to pass the stone. If you cannot keep fluids down, you usually need medical help for hydration and pain control.
If you’re working on prevention, consider baseline labs (kidney function, calcium, uric acid) starting from $99 panel with 100+ tests, one visit.
Results in days
Clear next steps
HSA / FSA
Causes and risk factors
Not drinking enough fluids
When you are dehydrated, your urine becomes more concentrated, which makes it easier for minerals to stick together and form crystals. You might not feel “dehydrated” in a dramatic way, but darker urine and infrequent peeing are common clues. For many people, improving hydration is the single biggest prevention lever.
Your urine chemistry and stone type
Different stones form for different reasons, and the most common are calcium-based stones (often calcium oxalate). Some people have urine that is higher in calcium, oxalate, or uric acid, or lower in citrate, which normally helps prevent crystals from clumping. Knowing your stone type matters because the prevention plan is not the same for everyone.
Diet patterns that concentrate minerals
A high-salt diet can push more calcium into your urine, which raises stone risk even if your blood calcium is normal. Very high animal-protein intake can also change urine acidity and lower protective citrate, which makes stones more likely in some people. This does not mean you need a perfect diet overnight, but it does mean small, consistent changes can pay off.
Family history and past stones
If you have had one kidney stone, your risk of another is higher because your baseline urine chemistry and habits tend to stay similar. A family history can point to inherited tendencies, even if you do everything “right.” That is why prevention is usually a long game, not a one-time fix.
Medical conditions and certain medicines
Gut conditions that cause chronic diarrhea can lead to fluid loss and changes in oxalate absorption, which can increase stone risk. Recurrent urinary infections can contribute to infection-related stones in some cases. Some medications and supplements can also shift urine chemistry, so it is worth reviewing what you take with your clinician if stones keep recurring.
How kidney stones are diagnosed
Your story and a focused exam
Clinicians pay close attention to where your pain started, whether it comes in waves, and whether it radiates toward your groin. They also look for signs that point away from stones, such as pain that is clearly tied to movement or tenderness over a specific muscle. This step matters because appendicitis, gallbladder problems, and ovarian or testicular emergencies can sometimes look similar at first.
Urine testing for blood and infection
A urinalysis checks for blood, which is common with stones, and for signs of infection such as white blood cells or nitrites. This is not just a formality, because a urinary infection with an obstructing stone can become an emergency. If you have fever, chills, confusion, severe weakness, or low blood pressure symptoms along with urinary pain, you should seek urgent care.
Imaging to confirm size and location
Imaging shows whether a stone is present, where it is stuck, and whether urine is backing up into your kidney. A low-dose CT scan is very accurate, while ultrasound is often used when radiation should be minimized, such as during pregnancy. Size and location drive the plan, because a tiny stone near the bladder is a different situation than a larger stone high in the ureter.
Blood tests and prevention work-up
Blood tests can check kidney function and look for contributors like high calcium or high uric acid. If you have repeat stones, your clinician may recommend a 24-hour urine collection to measure things like urine volume, calcium, oxalate, citrate, and sodium. If you are trying to get a baseline picture, VitalsVault lab testing can support that conversation, starting from $99 panel with 100+ tests, one visit.
Treatment options that actually help
Pain control while the stone passes
The pain comes from spasm and pressure in the ureter, so controlling it is not “optional,” it is part of treatment. Anti-inflammatory pain medicines are often used because they can reduce swelling around the stone, but the right choice depends on your kidney function and other conditions. If pain is not controlled at home, urgent care or the ER can provide stronger options and IV fluids when needed.
Hydration and nausea support
Drinking enough fluid helps keep urine moving, but forcing large amounts when you are vomiting can backfire. If you can sip and keep liquids down, steady hydration is helpful, and clear urine is a practical goal. If you cannot keep fluids down for hours, you may need IV hydration and anti-nausea medication to break the cycle.
Medical expulsive therapy (helps it pass)
For some stones in the ureter, a medication that relaxes the ureter (medical expulsive therapy) can improve the chance of passing the stone and shorten the timeline. It is not a guarantee, and it is not used for every situation, but it can be a useful bridge when the stone is likely to pass. Your clinician decides based on your symptoms, stone size, and whether there are signs of infection or kidney stress.
Procedures to break or remove stones
If a stone is too large to pass, causes ongoing severe symptoms, or blocks urine flow, procedures can help. Shock wave treatment breaks a stone into smaller pieces, while ureteroscopy uses a small scope to remove or laser the stone. For very large stones, a procedure through the back of the kidney may be recommended, and the goal is to protect your kidney while ending the pain.
Treating infection or obstruction quickly
If you have a stone plus a urinary infection, the priority is to relieve blockage and treat the infection, because bacteria trapped behind an obstruction can spread fast. This may mean antibiotics and a temporary stent or drainage tube before definitive stone removal. It is one of the main reasons you should not “wait it out” if you have fever or feel systemically sick.
Living with kidney stones (and the fear of the next one)
Tracking symptoms without spiraling
It helps to note when pain starts, where it moves, and whether you are peeing normally, because that information guides care. At the same time, you do not need to monitor every sensation minute by minute. A simple check-in a few times a day is usually enough unless symptoms are worsening.
Straining urine to catch the stone
If you can catch the stone when it passes, your clinician can send it for analysis, which often changes your prevention plan in a very practical way. You usually do this by peeing through a small strainer provided by a clinic or pharmacy. It is a little annoying, but it can save you months of guesswork.
Knowing when to get rechecked
If pain is improving and you are peeing normally, you may be able to manage with outpatient follow-up. But if pain keeps returning at full intensity, you stop being able to urinate, or you develop fever or chills, you should be seen quickly. Those changes can signal worsening obstruction or infection, which needs prompt treatment.
Planning for work, travel, and sleep
Stone pain can be unpredictable, so it is reasonable to plan for short rest periods, easy access to a bathroom, and a backup plan if pain spikes. Sleep often improves once pain is controlled, but nighttime waves can happen, especially early on. If you are traveling, having your diagnosis and medication plan written down can reduce stress and delays if you need care away from home.
Prevention and lowering your risk
Aim for pale, frequent urine
The most reliable prevention habit is producing enough urine each day, which usually means drinking regularly rather than chugging once. A practical target is urine that is light yellow most of the time. If you sweat a lot at work or during exercise, you will need more fluid than someone who is sedentary.
Cut back on salt, not calcium
Many people assume they should avoid calcium, but for common calcium oxalate stones, normal dietary calcium can actually help by binding oxalate in your gut. Salt is often the bigger problem because it increases calcium loss into urine. Reading labels and reducing processed foods can make a noticeable difference without feeling like a punishment.
Match prevention to your stone type
If your stones are uric acid–based, lowering urine acidity and addressing uric acid levels can be key, which is different from an oxalate-focused plan. If citrate is low, increasing citrate through diet or medication may be recommended. This is why stone analysis and urine testing are so useful, because they turn prevention into a targeted strategy.
Follow-up labs and urine testing
After a stone, checking kidney function and looking for contributors like high calcium or uric acid can catch treatable issues early. If you have recurrent stones, a 24-hour urine study can show exactly what is driving crystal formation in your body. When you have numbers to track, prevention stops being vague and becomes measurable.
Frequently Asked Questions
What does kidney stone pain feel like compared with a back strain?
Kidney stone pain often comes in waves and makes it hard to find any comfortable position, while a muscle strain is usually more tied to movement and specific tenderness. Stone pain commonly starts in your flank and can move toward your lower belly or groin. If you also have urinary symptoms like blood in your urine or burning, stones move higher on the list.
How long does it take to pass a kidney stone?
It depends mostly on the stone’s size and where it is located. Small stones may pass in days, while others take weeks, especially if they are higher up in the ureter. If symptoms are not improving, or imaging shows a larger stone, your clinician may recommend a procedure rather than waiting.
When should you go to the ER for kidney stones?
Go urgently if you have fever or chills, feel faint or severely weak, cannot keep fluids down, or cannot urinate. Those can be signs of infection, dehydration, or dangerous obstruction. Also seek urgent care if pain is uncontrolled despite medication or suddenly worsens.
Can kidney stones cause a urinary tract infection?
A stone can block urine flow and create a situation where bacteria grow more easily, and it can also make a UTI harder to clear. Sometimes the infection comes first and contributes to certain stone types, but either way the combination needs prompt evaluation. If you have UTI symptoms plus flank pain, testing is important.
What tests help figure out why you keep getting kidney stones?
Stone analysis (if you catch one) is a big clue because it tells you what the stone is made of. Blood tests can check kidney function and contributors like calcium and uric acid, and a 24-hour urine test can measure urine volume and crystal-forming chemicals. If you are building a prevention plan, having baseline labs to track over time can be helpful.