A kidney stone forms when the minerals in urine crystallize and turn into a stone within the kidney or in the urinary tract. In many patients, a kidney stone manifests with short-term attacks of pain and can resolve completely with appropriate treatment. However, in some cases a kidney stone can damage the kidney and, especially if left untreated, can lead to permanent problems.
How Does a Kidney Stone Damage the Kidney?
The mechanism by which a kidney stone damages the kidney usually develops through its obstruction of urine flow. When the stone blocks the urinary tract, pressure increases in the kidney and, over time, the following problems can arise:
Obstruction of Urine Flow
If the stone blocks the urinary canal:
- Urine accumulates within the kidney
- The kidney swells (hydronephrosis)
- Pressure increases
If this condition lasts a long time, the kidney tissue can be damaged.
Thinning of the Kidney Tissue
Long-term obstruction can cause:
- Thinning of the kidney tissue
- Loss of function
- Permanent damage
The Development of Infection
By impairing urine flow, the stone increases the risk of infection:
- Urinary tract infection
- Kidney infection (pyelonephritis)
- Fever and shivering
When infection and obstruction occur together, the situation becomes more serious.
Chronic Kidney Damage
Stones left untreated for a long time can lead to permanent loss of kidney function as a result of:
- Recurrent obstruction
- Constant pressure
- Infections
Does Every Kidney Stone Damage the Kidney?
No. Most kidney stones:
- Are small in size
- Can pass on their own
- Cause temporary pain
and do not leave permanent damage.
However, the risk increases in the following situations:
- Large stones
- Stones that block the urinary tract for a long time
- The presence of a single kidney
- Stones accompanied by infection
- Recurrent stone disease
How Long Does It Take for a Kidney Stone to Cause Damage?
The time to damage varies from person to person, but:
- Obstruction within days to weeks: usually reversible
- Obstruction lasting months: risk of permanent damage
- If infection accompanies it, the process progresses faster
Which Symptoms Are Dangerous When You Have a Kidney Stone?
The following situations require urgent evaluation:
- Severe and persistent flank pain
- Fever and shivering
- Inability to urinate
- Nausea and vomiting
- Marked blood in the urine
- The presence of a single kidney
These situations can put kidney functions at risk.
How Is Kidney Stone Damage Recognized?
The methods used in diagnosis:
- Ultrasonography (is there hydronephrosis?)
- CT (the location and size of the stone)
- Blood tests (creatinine)
- Urinalysis
What Is the Treatment If a Kidney Stone Damages the Kidney?
Treatment varies according to the degree of damage:
In Emergency Situations
- Drainage of the urine (stent or nephrostomy)
- Antibiotics if there is an infection
Clearing the Stone
- ESWL (stone breaking)
- Ureteroscopy (removing the stone with a camera)
- Percutaneous surgery (for large stones)
Kidney Function Follow-Up
- Regular blood tests
- Imaging check-ups
Summary
Although a kidney stone often seems like a simple and temporary problem, it can damage the kidney, especially when it blocks the urinary tract and is left untreated for a long time. The most important risks are obstruction, infection and damage to the kidney tissue. With early diagnosis and appropriate treatment, the vast majority of this damage can be prevented and kidney functions can be preserved.
