When should I go to the ER for kidney stones?
Go to the ER rather than urgent care. Confirming a stone and checking whether it is blocking the kidney takes a CT scan, which urgent care clinics do not have, and severe stone pain needs IV medication rather than oral pills. Come in immediately if you have fever or chills with stone pain. A known small stone with mild, controlled pain can follow the plan your urologist gave you.
Why This One Is an ER Decision
Two things settle it, and urgent care has neither.
The first is imaging. A CT scan is the standard test for diagnosing a kidney stone, and it answers the question that actually matters: not just whether there is a stone, but how big it is and whether it is blocking the kidney. That single finding decides whether you go home with a plan or need a urologist the same day. Urgent care clinics and primary care offices generally do not have CT.
The second is pain control. Stone pain is frequently beyond what oral medication can manage, especially when you are vomiting and cannot keep pills down. IV pain medication, anti-nausea medication, and fluids are given during an ER visit and work on a different timescale than a prescription you have to go fill.
So if you are in real stone pain, an ER is the right choice. It can image, diagnose, and begin treatment in a single visit.
Come In Now If
- Pain you cannot get comfortable with, especially coming in waves with nausea or vomiting you cannot control
- Fever or chills along with stone symptoms. This is the combination that matters most
- Blood in your urine with severe pain
- Difficulty urinating, or not being able to urinate at all
- Stone symptoms when you have only one working kidney, are pregnant, or have diabetes or a weakened immune system
- A first episode of severe flank pain, particularly after about age 50, stone-like pain is the classic presentation of a leaking abdominal aortic aneurysm, and that gets ruled out rather than assumed
Instead If
Most stone pain is safe to travel with, and we would rather you came in than waited. Call emergency care rather than driving if someone is confused, faint, or collapsing, has a fever with shaking chills and looks seriously unwell, or cannot stay awake. Those point toward sepsis from an infected, obstructed kidney, where the clock matters.
What Happens When You Arrive
A board-certified emergency physician examines you and starts testing without waiting on the pain to settle. Urine testing checks for blood and signs of infection. Blood work assesses kidney function and looks for infection. CT imaging on site shows the stone’s size and location and whether it is obstructing.
Treatment usually begins with IV pain medication, anti-nausea medication and fluids. Most stones ultimately pass on their own, so if yours is small and your symptoms are controlled, you go home with medication, written instructions and follow-up. If the stone is large, blocking the kidney, or infected, we start antibiotics where needed and coordinate prompt urology care or hospital transfer for a procedure such as lithotripsy or ureteroscopy. We diagnose and treat in a single visit, and most patients do not need a hospital transfer.
When Your Urologist’s Plan Is Reasonable
Not every stone needs an emergency visit. If you have a known small stone, your pain is mild and controlled with over-the-counter medication, and you are drinking fluids, keeping them down and urinating normally with no fever, it is often reasonable to follow the plan your doctor or urologist already gave you. Many small stones pass with time, fluids and oral pain control.
That picture changes fast. If the pain becomes severe or unrelenting, vomiting stops you keeping fluids down, you develop a fever, or you stop passing urine. Stop waiting and come in.
For a complete guide, see our kidney stones page. Bellaire ER is open 24 hours a day, 365 days a year at 5302 Bellaire Blvd with on-site CT, ultrasound and a full lab. Walk in any time, or call (713) 660-0001. For a life-threatening emergency, call emergency care.