A 22 mm kidney stone is a relatively large urinary stone measuring approximately 2.2 cm.
A stone of this size is generally unlikely to pass naturally through the urinary tract compared with smaller stones. The appropriate treatment depends on its exact location, composition, shape, symptoms, urinary drainage and the condition of the kidneys.
People searching for 22 mm kidney stone treatment often want to know whether medicines or increased water intake can dissolve or remove such a large stone.
In most cases, a stone measuring 22 mm requires specialist assessment and consideration of a stone-removal procedure, rather than relying on home remedies alone.
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation of kidney conditions and can help assess kidney function and coordinate appropriate management when a large kidney stone is present.
Can a 22 mm Kidney Stone Pass Naturally?
A 22 mm stone is much larger than stones that commonly pass spontaneously.
The likelihood of natural passage depends on:
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Stone size
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Stone location
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Shape
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Anatomy of the urinary tract
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Degree of obstruction
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Previous stone history
A stone of this size may become lodged in the urinary tract and cause obstruction.
Therefore, patients should not assume that drinking excessive amounts of water will force a 22 mm stone out.
Is 22 mm Kidney Stone Treatment Different From Smaller Stones?
Yes.
Small stones may sometimes be managed with observation, pain control and medical expulsive therapy when appropriate.
A 22 mm stone is considered a large stone, and spontaneous passage is unlikely.
Treatment planning may therefore focus on physically fragmenting or removing the stone.
The best procedure depends on where the stone is located.
Where Can a 22 mm Stone Be Located?
A 22 mm stone may be found in:
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Kidney
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Renal pelvis
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Upper ureter
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Middle ureter
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Lower ureter
A stone located within the kidney is treated differently from one obstructing the ureter.
The imaging report should therefore be reviewed carefully before choosing a procedure.
How Is a 22 mm Kidney Stone Diagnosed?
A doctor may use several investigations to understand the stone and its effect on kidney function.
Ultrasound
Ultrasound can identify many kidney stones and may show swelling of the kidney caused by obstruction.
CT Scan
A non-contrast CT scan is commonly useful for evaluating urinary stones because it can provide detailed information about:
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Stone size
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Stone location
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Number of stones
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Degree of obstruction
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Urinary anatomy
Urine Tests
Urine testing may identify:
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Blood
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Infection
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Crystals
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Other abnormalities
Blood Tests
Doctors may check:
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Creatinine
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eGFR
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Electrolytes
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Blood count
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Other relevant markers
These tests help determine whether the stone is affecting kidney function or whether an infection is present.
What Are the Treatment Options for a 22 mm Kidney Stone?
Treatment is individualized, but procedures commonly considered for larger stones include:
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Percutaneous nephrolithotomy (PCNL)
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Flexible ureteroscopy with laser lithotripsy
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Shock wave lithotripsy (SWL/ESWL) in selected cases
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Other staged or combined approaches depending on stone characteristics
The choice is influenced by the stone's size, location, composition, anatomy and the patient's overall health.
PCNL for a 22 mm Kidney Stone
Percutaneous nephrolithotomy (PCNL) is an established procedure used for removing larger kidney stones.
A small access tract is created through the skin into the kidney, allowing instruments to reach and fragment or remove the stone.
For large renal stones, PCNL may provide an effective way of achieving substantial stone clearance.
The suitability of PCNL depends on the patient's anatomy, stone location and other medical factors.
Laser Treatment for a 22 mm Kidney Stone
Another option may be flexible ureteroscopy with laser lithotripsy.
During this procedure, a small endoscope is passed through the natural urinary passage to reach the stone.
A laser can then fragment the stone into smaller pieces.
The fragments may be removed with specialized instruments or allowed to pass depending on their size and the clinical situation.
For a 22 mm stone, more than one treatment session may sometimes be necessary to achieve complete clearance.
Can ESWL Treat a 22 mm Kidney Stone?
Extracorporeal shock wave lithotripsy (ESWL/SWL) uses externally generated shock waves to break a stone into smaller fragments.
Whether ESWL is appropriate for a 22 mm stone depends on factors such as:
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Stone location
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Stone composition
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Stone density
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Body habitus
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Kidney anatomy
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Degree of obstruction
Large stones may require multiple sessions and can leave a substantial amount of residual stone material.
Therefore, ESWL should be selected only after appropriate imaging and specialist assessment.
Is 22 mm Kidney Stone Treatment Possible Without Surgery?
For a stone this large, simply waiting for spontaneous passage is generally not an effective strategy.
Medicines may help manage symptoms or assist passage of selected smaller stones, but they generally do not dissolve most common types of 22 mm kidney stones.
There are exceptions for certain stone compositions, such as some uric acid stones, which may respond to medically supervised urine alkalinization.
Determining the stone type is therefore important.
Do not use stone-dissolving medicines without medical advice.
Can Drinking More Water Remove a 22 mm Stone?
Drinking an appropriate amount of fluid is important for kidney health and stone prevention.
However, drinking excessive amounts of water does not reliably remove a 22 mm stone.
If a large stone is obstructing urine flow, forcing large quantities of water may increase discomfort and does not remove the physical blockage.
Fluid intake should be individualized, particularly if kidney function is reduced or urinary obstruction is present.
What Symptoms Can a 22 mm Kidney Stone Cause?
A large kidney stone may cause:
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Severe side or flank pain
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Back pain
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Pain radiating toward the abdomen or groin
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Blood in urine
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Nausea
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Vomiting
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Burning while urinating
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Frequent urination
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Recurrent urinary infections
Some kidney stones cause few symptoms and are discovered incidentally during imaging.
The absence of pain does not necessarily mean that the stone is harmless.
Can a 22 mm Stone Block the Kidney?
Yes.
A stone can obstruct the urinary tract and interfere with urine drainage.
Persistent obstruction can cause swelling of the kidney and, if untreated, may impair kidney function.
The risk is particularly concerning when obstruction occurs together with infection.
What If a 22 mm Stone Causes Infection?
A blocked urinary tract combined with infection can be a medical emergency.
Warning signs include:
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Fever
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Chills
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Severe flank pain
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Vomiting
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Reduced urine output
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Burning urination
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Feeling extremely unwell
If an infected kidney is obstructed, urgent medical treatment may be necessary.
In some cases, the first priority is to establish urine drainage with a ureteral stent or nephrostomy, followed by definitive stone treatment after the infection has been appropriately managed.
Does a 22 mm Stone Affect Kidney Function?
It can, particularly if it causes persistent obstruction, recurrent infection or significant inflammation.
Patients with a large stone may therefore need kidney-function testing, including:
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Serum creatinine
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eGFR
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Urinalysis
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Other blood tests as clinically indicated
If kidney function is already reduced, treatment planning requires additional care.
What Happens Before Kidney Stone Surgery?
Before a procedure, the treating team may review:
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CT or ultrasound findings
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Stone size
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Stone location
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Kidney anatomy
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Kidney function
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Urine culture
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Blood tests
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Current medications
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Medical conditions
A urine infection should generally be identified and appropriately treated before definitive stone removal.
The doctor will also explain the expected benefits, possible complications and likelihood of needing additional treatment.
Can a 22 mm Kidney Stone Require More Than One Procedure?
Yes.
Large stones may sometimes require:
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More than one ureteroscopy
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Multiple ESWL sessions
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Staged procedures
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A combination of treatment techniques
The likelihood depends on stone burden, location, density and the selected procedure.
The goal is to achieve safe and effective stone clearance while minimizing unnecessary injury to the urinary tract.
Recovery After 22 mm Kidney Stone Treatment
Recovery varies according to the procedure.
After treatment, some patients may temporarily experience:
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Mild blood in urine
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Urinary frequency
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Burning during urination
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Flank discomfort
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Passage of small stone fragments
A temporary ureteral stent may be placed after some procedures.
Patients should follow the treating specialist's instructions regarding medicines, fluid intake, activity and follow-up imaging.
Why Might a Stent Be Used After Stone Treatment?
A ureteral stent is a thin tube placed inside the ureter to help maintain urine flow from the kidney to the bladder.
A stent may be recommended when:
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The ureter is swollen
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Stone fragments need to pass
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There is a risk of obstruction
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The procedure has caused temporary ureteral irritation
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The doctor wants to support drainage during recovery
Stents are usually temporary and need to be removed or exchanged according to the treating doctor's plan.
Can a 22 mm Kidney Stone Come Back After Treatment?
Yes.
Removing an existing stone does not eliminate the factors that caused it.
Depending on the stone type, recurrence may be associated with:
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Low fluid intake
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High dietary sodium
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Certain dietary patterns
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Metabolic abnormalities
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Recurrent urinary infections
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Family history
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Certain medical conditions
After stone treatment, patients may benefit from preventive evaluation.
Stone analysis and, in selected patients, metabolic testing can help guide prevention.
How Can Future Kidney Stones Be Prevented?
Prevention depends on the type of stone and individual risk factors.
General measures may include:
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Maintain appropriate fluid intake.
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Reduce excessive dietary sodium.
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Follow an individualized diet.
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Avoid unnecessary supplements.
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Take prescribed preventive medicines correctly.
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Treat recurrent urinary infections appropriately.
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Attend follow-up appointments.
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Complete recommended metabolic evaluation.
Do not make major dietary changes without professional guidance, particularly if you have kidney disease or other medical conditions.
When Should You Seek Urgent Medical Attention?
A patient with a known large kidney stone should seek urgent medical care if they develop:
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Fever or chills
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Severe or worsening flank pain
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Persistent vomiting
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Very little or no urine
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Severe weakness
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Confusion
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Blood in urine with worsening symptoms
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Severe pain accompanied by fever
A blocked and infected urinary tract requires prompt assessment.
Kidney Stone Evaluation at Prabhakar Bhurke Clinic
At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist kidney evaluation for patients with kidney stones and associated kidney-function concerns.
Depending on the patient's situation, evaluation may include:
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Kidney-function assessment
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Creatinine and eGFR testing
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Review of ultrasound or CT findings
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Assessment of urinary obstruction
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Evaluation of recurrent urinary infections
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Stone-related kidney damage assessment
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Medical management of kidney-related complications
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Coordination with appropriate surgical or urological specialists when stone removal is required
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Follow-up kidney care after stone treatment
The appropriate treatment pathway depends on the stone's size, location, composition, obstruction status and the patient's overall health.
Frequently Asked Questions
Can a 22 mm kidney stone pass naturally?
Spontaneous passage of a 22 mm stone is unlikely. A specialist should assess the stone and determine whether active removal is appropriate.
What is the best treatment for a 22 mm kidney stone?
There is no single procedure that is best for every patient. PCNL, flexible ureteroscopy with laser lithotripsy and, in selected cases, ESWL may be considered depending on stone characteristics and anatomy.
Can medicine dissolve a 22 mm kidney stone?
Most common kidney stones cannot simply be dissolved with medicine. Certain uric acid stones may respond to medically supervised dissolution therapy.
Is laser treatment possible for a 22 mm stone?
Yes, flexible ureteroscopy with laser lithotripsy can be used for selected large stones. Depending on the stone burden, more than one session may be required.
Is PCNL suitable for a 22 mm kidney stone?
PCNL is commonly considered for larger renal stones, but suitability depends on the stone's location, anatomy, medical history and other factors.
Can a 22 mm kidney stone damage the kidney?
A large stone can potentially impair kidney function if it causes persistent obstruction, recurrent infection or other complications.
How long can a 22 mm kidney stone stay in the kidney?
There is no fixed time limit. A stone may remain stable for a period or grow over time, but its presence should be assessed by a specialist, especially if it causes obstruction, infection or symptoms.
Conclusion
A 22 mm kidney stone is a large stone for which spontaneous passage is unlikely. Treatment planning usually requires detailed imaging and specialist assessment rather than relying on increased water intake or home remedies.
Depending on the stone's location, density, anatomy and the patient's health, treatment may involve PCNL, flexible ureteroscopy with laser lithotripsy, ESWL or a staged approach.
Prompt treatment is especially important when a large stone causes urinary obstruction or occurs alongside infection, reduced urine output or declining kidney function.
If you have been diagnosed with a 22 mm kidney stone, discuss the available treatment options with a qualified specialist rather than delaying care.
For specialized kidney evaluation and kidney-function management, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.
Medical Disclaimer
This article is intended for general educational and informational purposes only and should not be considered medical advice, diagnosis or treatment. The appropriate treatment for a 22 mm kidney stone depends on its location, composition, anatomy, obstruction, infection status, kidney function and the patient's overall health. Not every patient is suitable for PCNL, laser lithotripsy or ESWL, and some patients may require staged or combined treatment. Do not attempt to force a large stone to pass by drinking excessive amounts of water or by taking unprescribed medicines or herbal remedies. Fever, chills, severe flank pain, persistent vomiting, very little or no urine, confusion or sudden worsening may indicate a serious complication requiring urgent medical attention. Consult Dr. Sandip Prabhakar Bhurke or another qualified kidney/urinary stone specialist for an individualized treatment plan.
