The fastest way to reduce kidney stone pain at home is to take an anti-inflammatory painkiller like ibuprofen, apply heat to your lower back or abdomen, and drink plenty of water. These three steps work together: the medication reduces the inflammation causing your pain, the heat relaxes the muscles around your ureter (the tube between your kidney and bladder), and the water helps move the stone along. Most kidney stones under 5 mm will pass on their own within a few days to a couple of weeks with these measures.
Take the Right Painkiller First
Anti-inflammatory painkillers (NSAIDs) like ibuprofen and naproxen are your best first option. Kidney stone pain is largely caused by inflammation and swelling where the stone is lodged, and NSAIDs target that inflammation directly. A large meta-analysis in European Urology found that NSAIDs outperformed opioids for initial pain reduction at 30 minutes, and patients who took NSAIDs were 44% less likely to need additional rescue pain medication.
Acetaminophen (Tylenol) also works and showed similar short-term pain relief to NSAIDs in clinical comparisons. If you can’t take ibuprofen because of stomach issues or other reasons, acetaminophen is a reasonable alternative. But if you can tolerate both, you can actually use them together. There’s an FDA-approved combination tablet containing 250 mg acetaminophen and 125 mg ibuprofen, taken as two tablets every eight hours, up to six tablets per day. Even without the combination tablet, alternating ibuprofen and acetaminophen on offset schedules attacks the pain from two different angles. Just stay under 4,000 mg of acetaminophen total in 24 hours.
Apply Heat to Your Back or Abdomen
A heating pad placed on your lower back or over your abdomen on the side where the pain is worst can noticeably ease the cramping, spasming sensation that kidney stones cause. The heat relaxes the smooth muscle of your ureter, which spasms as it tries to push the stone through. This won’t move the stone faster, but it takes the edge off the waves of intense pain (called renal colic) that can make it impossible to sit still.
A warm bath works the same way and can help during especially intense episodes. Some people find that repositioning frequently, moving from sitting to standing to lying on the affected side, provides brief relief as it shifts the pressure. There’s no single “best position” backed by strong evidence, but many people find that lying on the side opposite the stone, or gently walking around, feels better than staying completely still.
Drink More Water Than You Think You Need
Hydration is one of the few things that actively helps the stone move. Aim for enough water to produce at least 2 to 2.5 liters of urine per day, which typically means drinking about 3 liters of fluid. This increased urine volume creates more flow through the ureter, helping push the stone toward the bladder. Sipping steadily throughout the day is more effective than drinking large amounts at once.
Adding lemon juice to your water gives you a small additional benefit. Citrate, found naturally in lemons, binds to calcium and can help prevent new stones from forming while you’re passing the current one. According to Harvard Health, drinking half a cup of lemon juice concentrate diluted in water each day, or the juice of two lemons, is enough to meaningfully increase citrate levels in your urine. This won’t dissolve an existing stone or reduce pain directly, but it’s a worthwhile habit to start during an active episode and continue afterward.
Medication That Helps the Stone Pass Faster
If your doctor has prescribed tamsulosin (often known by the brand name Flomax), taking it can significantly speed things up. This medication relaxes the muscles lining your ureter, making it easier for the stone to slide through. A systematic review of randomized trials found that tamsulosin increased stone expulsion rates by 44% and shortened the time to passage by roughly three-quarters of a day on average. The benefit is most pronounced for stones larger than 5 mm. For smaller stones (5 mm or less), the medication didn’t show a significant advantage, likely because those stones tend to pass on their own regardless.
Tamsulosin requires a prescription, so if you’re passing a stone and haven’t been prescribed it, it’s worth calling your doctor to ask. Many physicians will prescribe it over the phone if you have a confirmed stone on imaging.
What the Pain Actually Feels Like (and Why It Comes in Waves)
Kidney stone pain typically hits in waves rather than staying constant. Each wave corresponds to a spasm of the ureter as it contracts around the stone. The pain usually starts in your flank, the area between your ribs and hip on one side, and can radiate down into your groin, inner thigh, or lower abdomen as the stone moves lower. The location of your pain actually tells you roughly where the stone is: flank pain means it’s near the kidney, while groin or pelvic pain means it’s closer to the bladder.
Once the stone drops into your bladder, the intense pain usually stops abruptly. You may then feel urgency, burning, or discomfort when urinating as the stone passes out, but this is far more manageable than the ureteral pain. The entire process can take anywhere from a few hours to several weeks, depending on the stone’s size and location.
When Home Treatment Isn’t Enough
Most small kidney stones can be managed at home, but certain symptoms signal that you need emergency care. According to the Mayo Clinic, you should get medical attention right away if you experience:
- Pain so severe you can’t sit still or find any comfortable position
- Fever or chills alongside the pain, which may indicate an infection behind the stone
- Nausea and vomiting that prevent you from keeping down fluids or medication
- Blood in your urine (some pink or light red is common with stones, but heavy bleeding warrants evaluation)
- Difficulty passing urine or a significant drop in how much you’re producing
Fever with a kidney stone is the most urgent of these. A stone that blocks urine flow while an infection is present can escalate quickly into a serious condition that requires hospital treatment. If you have a temperature alongside your stone pain, don’t wait it out.