Kidney stones and urgent care: When to go and what to expect

Yes — urgent care can evaluate and treat kidney stones in most non-emergency presentations. If you have flank pain and suspect a kidney stone, an urgent care center can order imaging to confirm the diagnosis, manage your pain, prescribe medications to help the stone pass, and determine whether you need higher-level care. The key question is whether your symptoms are stable enough for urgent care or severe enough to warrant an emergency room visit.

Can urgent care treat kidney stones?

Urgent care is an appropriate first stop for kidney stone symptoms when your pain is manageable, you are not running a fever, and you are not vomiting uncontrollably. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) notes that many kidney stones pass on their own with supportive care — hydration, pain management, and watchful waiting.¹ Urgent care can provide exactly that care, along with the diagnostic imaging needed to confirm a stone is present and assess its size and location.

Urgent care cannot perform surgical procedures such as shock wave lithotripsy, ureteroscopy, or percutaneous nephrolithotomy. If imaging shows a large stone (typically over 6–7mm), a stone that is obstructing the kidney, or any signs of infection, the urgent care provider will refer you to a urologist or send you to the ER.

What are the symptoms of a kidney stone?

The hallmark symptom is severe, cramping pain that typically starts in the side and back, below the ribs, and may radiate to the lower abdomen and groin. The Urology Care Foundation describes the pain as coming in waves and fluctuating in intensity as the stone moves through the urinary tract.² Other common symptoms include:

• Pain or burning during urination
• Pink, red, or brown urine (blood in urine)
• Cloudy or foul-smelling urine
• Nausea and vomiting
• Frequent urge to urinate
• Urinating in small amounts

If you also have a fever or chills alongside any of the above, go to the emergency room — this combination may indicate a kidney infection, which is a more serious condition requiring IV antibiotics and hospital-level care.

How does urgent care diagnose kidney stones?

Urgent care providers use a combination of history, physical exam, and diagnostic tests to confirm a kidney stone diagnosis:¹

• CT scan (low-dose, non-contrast): The gold standard for detecting kidney stones. Fast and highly accurate, it can identify stones too small to see on X-ray and show exactly where the stone is lodged.
• Ultrasound: A radiation-free alternative, particularly useful for pregnant patients or when CT is not immediately available. Slightly less sensitive for small stones than CT.
• Urinalysis: Checks for blood, infection, and mineral crystals in the urine. Blood in urine is present in most kidney stone cases.
• Basic metabolic panel: A blood test to evaluate kidney function and check for signs of infection or electrolyte abnormalities.

What treatment does urgent care offer for kidney stones?

For stones that are small enough to pass on their own, urgent care treatment typically includes:

• IV or oral pain medication: NSAIDs (such as ketorolac) are first-line for kidney stone pain. Opioid medications may be used if NSAIDs are insufficient or contraindicated.
• Anti-nausea medication: Ondansetron (Zofran) or similar medications if nausea or vomiting is significant.
• IV fluids: If you are dehydrated from vomiting or unable to keep fluids down.
• Alpha-blockers: Tamsulosin (Flomax) is commonly prescribed to relax the ureter and help smaller stones pass more quickly, per NIDDK guidance.¹
• Take-home instructions: Drink enough fluid to produce approximately 2 liters of urine per day, strain your urine to catch the stone for lab analysis, and take pain medication as directed.

When should you go to the ER instead of urgent care?

Go directly to the emergency room — do not go to urgent care — if you experience any of the following:

• Fever (above 38°C / 100.4°F) with flank or back pain (possible infected, obstructed kidney — a urological emergency)
• Uncontrolled pain despite over-the-counter medication
• Severe, persistent vomiting preventing any oral intake
• You have only one functioning kidney
• Known kidney transplant
• Signs of sepsis: high fever, rapid heartbeat, confusion, low blood pressure

An infected obstructed kidney can deteriorate quickly. If this is your presentation, you need IV antibiotics and emergency urology consultation — resources urgent care does not have.

What to do after your urgent care visit

After being evaluated and treated at urgent care, follow these steps to support passage of the stone and prevent complications:

• Stay well hydrated. Drink enough fluid to produce at least 2 liters of clear urine per day. Water is best. The NIDDK recommends six to eight 8-ounce glasses of fluids daily unless you have kidney failure.¹
• Strain your urine. Use a urine strainer or fine mesh to catch any passed stone. Bring it to your follow-up appointment — stone composition analysis helps guide prevention.
• Take medications as prescribed. Finish any alpha-blocker course and use pain medications as directed.
• Follow up with a urologist. If the stone has not passed within 4 weeks, or if you have recurrent stone episodes, a urologist can evaluate for underlying metabolic causes and discuss stone removal options.
• Return immediately if you develop fever, chills, increasing pain, or inability to urinate.

How to prevent kidney stones

The Urology Care Foundation and NIDDK both emphasize that most kidney stones are preventable with lifestyle modifications:^1,2

• Drink enough fluid to produce 2+ liters of urine daily
• Reduce sodium intake — high sodium increases calcium in the urine
• Moderate animal protein consumption
• Eat adequate dietary calcium (restricting calcium can paradoxically increase stone risk)
• Avoid high-oxalate foods if you form calcium oxalate stones (spinach, beets, nuts, chocolate)
• Talk to your doctor about preventive medications if you have recurrent stones

Next steps

Kidney stone pain comes on fast and demands immediate attention. If your symptoms are stable, urgent care offers same-day diagnosis and treatment without the long wait of an emergency department. Use Solv to find an urgent care center near you, confirm they have on-site imaging, and get seen today.