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The passage timeline, pain management, home care, and the red flags that mean 'go to the ER now' — a practical guide for the stone patient.
Evidence reviewed & updated: 2026-08 — reflects the latest published trials and guidelines.
Most stones under 5 mm pass within 2-3 weeks, and 5-10 mm stones within about 4-6 weeks. Pain comes in waves; NSAIDs are the best pain relief unless kidney function is impaired. Tamsulosin (Flomax) speeds passage of distal ureteral stones. Fever, anuria, and intractable vomiting are ER reasons.
Most stones that will pass do so within 2-3 weeks (median); stones 5-10 mm may take 4-6 weeks. There's no reliable way to force a stone out faster at home — drinking extra water beyond normal doesn't speed passage (though hydration matters for prevention).
If a stone hasn't passed in 4-6 weeks, or if symptoms persist, intervention (ureteroscopy or lithotripsy) is usually discussed. Prolonged obstruction can damage the kidney, so watchful waiting has a limit.
NSAIDs (diclofenac, ketorolac, ibuprofen) are the first-line pain treatment for renal colic — they're more effective than opioids for this pain and have fewer side effects. Important caveat: NSAIDs are avoided or dose-adjusted when kidney function is impaired or in CKD — ask your doctor which is safe for you.
Nausea and vomiting are common (the kidney-ureter reflex). An antiemetic helps you keep fluids down. A heating pad on the flank and finding a position that helps (often leaning forward) can ease discomfort between waves.
When the stone reaches the bladder, the pain usually stops abruptly. Passing it through the urethra is quick but can sting. Strain your urine (mesh strainer from the pharmacy or a coffee filter) to catch the stone — stone analysis tells you what type it is and shapes prevention.
After passage: expect mild burning and possibly a little blood for a day or two. Book a follow-up with a urologist, and if you haven't had one, get the 24-hour urine metabolic evaluation — it converts prevention from guesswork to targeted therapy.
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