How Do Doctors Assess Kidney Stones?
During your evaluation, your doctor may consider:
- Stone size: Smaller stones are generally more likely to pass naturally than larger ones.
- Stone location: Whether the stone is located within the kidney, upper ureter, lower ureter or close to the bladder influences how likely it is to pass naturally and which treatments are suitable.
- Symptoms: The severity of pain, nausea, vomiting, visible blood in the urine or difficulty passing urine all provide important clinical information.
- Urinary obstruction: Imaging helps determine whether the stone is blocking urine flow, which may place pressure on the kidney.
- Signs of infection: Fever, chills or laboratory evidence of infection require prompt medical attention, particularly if urine drainage is obstructed.
- Kidney function: Blood and urine tests help assess whether the kidneys are functioning normally.
- Medical history: Previous kidney stones, underlying medical conditions, medications and anatomical differences may all influence treatment planning.
To gather this information, doctors typically perform a combination of medical history-taking, physical examination, urine and blood tests, and imaging studies such as ultrasound or CT scans.
Can Kidney Stones Pass on Their Own?
Not every kidney stone requires an operation or procedure. Many smaller stones can pass naturally through the urinary tract with conservative management, provided there are no signs of complications.
Conservative management usually focuses on supporting the body's natural ability to pass the stone while keeping symptoms under control. This may include
- Adequate fluid intake where appropriate
- Pain-relieving medication
- Medication that relaxes the ureter to help the stone pass more easily
- Follow-up imaging to monitor the stone's progress
During this period, patients are usually advised to monitor their symptoms carefully and report any changes promptly. Depending on the stone, passing it naturally may take anywhere from a few days to several weeks.
However, conservative management is only suitable when the stone has a reasonable chance of passing safely. If symptoms worsen or the stone does not progress as expected, the treatment plan may need to be reviewed.
When Do Kidney Stones Need Active Treatment?
Although some stones pass naturally, active kidney stone treatment becomes more appropriate when observation is unlikely to achieve a safe or successful outcome.
Doctors may recommend intervention if:
- The stone is too large to pass naturally.
- Pain remains severe despite medication.
- The stone causes persistent urinary obstruction.
- There is evidence of urinary tract infection together with obstruction.
- Kidney function is affected.
- The stone fails to pass after an appropriate period of observation.
- Recurrent stone episodes significantly affect quality of life.
A kidney stone causing both urinary obstruction and infection is considered a medical emergency. In these situations, urgent drainage of the kidney is usually required before definitive stone removal can be performed.
The goal of intervention is not only to remove the stone but also to relieve symptoms, restore urine flow and reduce the risk of long-term kidney damage or further complications.
What Are the Main Treatments for Kidney Stones?
| Stone Characteristics | Treatment That May Be Considered |
|---|---|
| Small stones with a good chance of passing naturally | Conservative management with pain relief, hydration, medication where appropriate and monitoring |
| Small to moderate stones suitable for non-invasive treatment | Extracorporeal Shock Wave Lithotripsy (ESWL) |
| Stones in the ureter or kidney that are unlikely to pass naturally or are unsuitable for ESWL | Ureteroscopy (URS) or Retrograde Intrarenal Surgery (RIRS) |
| Large, complex or multiple kidney stones | Percutaneous Nephrolithomy (PCNL) |
Your doctor will also consider factors such as your symptoms, kidney function, overall health and treatment goals before recommending the most appropriate option.
Personalised Kidney Stone Treatment with Dr Lincoln Tan
Kidney stone treatment aims not only to relieve pain but also to preserve kidney function and reduce the risk of future stone episodes. Choosing the most appropriate approach begins with an accurate assessment of the stone and how it is affecting your urinary tract.
At Tan Urology, we provide comprehensive assessment and individualised management for patients with kidney stones. Dr Lincoln Tan evaluates every case to recommend the most appropriate management approach, whether conservative care or minimally invasive intervention. If you are experiencing symptoms of kidney stones or have been diagnosed with a stone requiring specialist assessment, book an appointment to discuss your treatment options and receive an individualised care plan.
