Kidney stones are hard mineral deposits that form inside your kidneys, and they can cause severe pain when they move. The good news is that many stones can pass on their own with the right approach, and some can actually be dissolved. The key is knowing what type of stone you have, because the treatment differs completely depending on its composition.
How To Dissolve Kidney Stones: What Actually Works
The honest answer is that only one common type of kidney stone can be reliably dissolved with medication. Uric acid stones respond well to a treatment that changes your urine chemistry. Most other stones — including the most common type, calcium oxalate stones — cannot be dissolved by any medication currently available.
For uric acid stones, doctors typically prescribe a medication called potassium citrate. This makes your urine less acidic, which helps uric acid crystals break apart. Some research suggests that drinking plenty of fluids and eating a diet lower in animal protein can also help prevent new uric acid stones from forming.
For calcium-based stones, the approach is different. You manage the pain, drink fluids to help the stone pass, and in some cases a doctor may need to break the stone up with sound waves or remove it surgically. No home remedy dissolves calcium stones.
Why Most Kidney Stones Cannot Be Dissolved
Kidney stones form when your urine becomes concentrated, allowing minerals to crystallize and stick together. The five main types of stones are calcium oxalate, calcium phosphate, uric acid, struvite, and cystine.
Calcium oxalate stones are by far the most common, accounting for about 80 percent of all kidney stones. These stones are extremely hard and do not respond to any oral medication. Uric acid stones, which make up about 5 to 10 percent of cases, are the one type that can often be dissolved with medication.
Struvite stones usually form after urinary tract infections and can grow quite large. Cystine stones are rare and genetic. Neither type dissolves easily with medication, though cystine stones sometimes respond to aggressive fluid intake and certain medications.
How Uric Acid Stones Dissolve
Uric acid stones form when your urine is too acidic. Normally, urine has a pH around 6.0. When it drops below 5.5, uric acid crystals can form.
Potassium citrate works by raising your urine pH to a more alkaline level, usually above 6.5. At that pH, uric acid crystals gradually dissolve. This process takes weeks to months, not days. Your doctor will monitor your urine pH regularly to make sure the dose is working.
Drinking large amounts of water is essential during this treatment. The goal is to produce about 2.5 liters of urine per day. That means drinking roughly 3 liters of fluids daily, unless your doctor advises otherwise. Water is the best choice. Some studies suggest that lemon juice in water may help, but the evidence is not strong enough to recommend it as a standalone treatment.
What to Do If You Have a Kidney Stone Right Now
If you are experiencing kidney stone pain, the first step is to see a doctor. Severe pain, fever, chills, or blood in your urine are signs you need immediate medical attention. Do not try to manage these symptoms at home.
For smaller stones, typically those under 5 millimeters, doctors often recommend a trial of passage. This means drinking plenty of water and taking over-the-counter pain medication. Most stones this size pass within a few weeks.
Stones between 5 and 10 millimeters are less likely to pass on their own. Stones larger than 10 millimeters almost always need intervention. These may require extracorporeal shock wave lithotripsy, which uses sound waves to break the stone into smaller pieces, or ureteroscopy, where a thin scope is passed into the urinary tract to remove the stone.
Your doctor may also give you a strainer to catch the stone when it passes. This is important because the stone needs to be analyzed to determine its type. That analysis guides future prevention strategies.
Home Remedies That Do Not Work
Social media is full of claims about natural ways to dissolve kidney stones. Apple cider vinegar, lemon juice, olive oil, and various herbal teas are commonly promoted. None of these have been proven to dissolve stones in human studies.
Apple cider vinegar is acidic. Drinking it does not change your urine pH enough to dissolve stones, and it can irritate your stomach and esophagus. Olive oil does not lubricate the urinary tract, despite what some viral videos claim.
Cranberry juice is sometimes mentioned, but the evidence is actually mixed on whether it helps or hurts. Some research suggests cranberry juice may increase the risk of calcium oxalate stones because it is high in oxalate. Do not use cranberry juice as a kidney stone treatment.
There is one dietary change with genuine evidence behind it. Citrate, found in lemons and oranges, can bind to calcium in urine and may help prevent stones from forming. Drinking lemon water daily may reduce your risk of new stones, but it will not dissolve existing ones.
How to Prevent Kidney Stones From Coming Back
Prevention depends entirely on what type of stone you had. Without knowing the stone composition, general advice is limited. This is why stone analysis is so important.
For calcium oxalate stones, the most common type, the main prevention strategies are:
- Drink enough water to produce at least 2.5 liters of urine daily
- Limit sodium to about 2,300 milligrams per day
- Get adequate calcium from food sources — low calcium diets actually increase stone risk
- Limit foods very high in oxalate, such as spinach, rhubarb, and almonds
- Maintain a healthy body weight
For uric acid stones, prevention focuses on reducing animal protein intake, limiting alcohol, and sometimes taking medication to keep urine pH in a safe range. Gout, diabetes, and metabolic syndrome all increase uric acid stone risk.
For struvite stones, the key is preventing urinary tract infections. These stones form when bacteria produce an enzyme that makes urine more alkaline. Treating infections promptly is the main preventive measure.
When to See a Doctor
You should see a doctor the first time you have symptoms that suggest a kidney stone. This is not something to diagnose yourself. The pain can mimic other conditions, including appendicitis, gallbladder disease, or a urinary tract infection.
Seek emergency care if you have any of these warning signs:
- Fever or chills, which may indicate an infection
- Inability to urinate
- Blood in your urine
- Pain so severe you cannot sit still or find a comfortable position
- Nausea and vomiting that prevents you from keeping fluids down
If you have had a kidney stone before, see a doctor again if symptoms return. Some people pass stones repeatedly without knowing what type they are, which makes prevention nearly impossible.
What the Research Shows About Dissolving Stones
The evidence for dissolving uric acid stones with potassium citrate is well established. This has been standard clinical practice for decades. The medication works by changing urine chemistry, and studies consistently show that most uric acid stones shrink or disappear with this treatment.
Research on dissolving other stone types is much more limited. Some experimental treatments have been studied, but none have reached standard clinical use. For example, certain topical medications applied directly to stones during surgery have shown promise in small studies, but these are not widely available.
Some research suggests that higher fluid intake reduces the risk of all stone types. The evidence is strongest for water. No commercial drink, supplement, or herbal product has been shown to match the preventive effect of plain water.
Frequently Asked Questions
Can apple cider vinegar dissolve kidney stones?
No. No clinical evidence shows that apple cider vinegar dissolves kidney stones of any type. Drinking it may irritate your stomach and esophagus without providing any benefit.
How long does it take for a kidney stone to pass?
Small stones under 5 millimeters typically pass within 1 to 2 weeks, though some take longer. Stones larger than 5 millimeters are less likely to pass on their own and may require medical intervention.
Can drinking more water dissolve kidney stones?
Water helps stones pass and prevents new ones from forming, but it does not dissolve stones that already exist. For uric acid stones, high fluid intake supports the medication that does the dissolving work.
What does a kidney stone feel like when passing?
Most people describe sharp, cramping pain in the side or back that comes in waves. The pain can move to the lower abdomen and groin as the stone travels through the urinary tract.
