Do you have a kidney ache and want to know what to drink to relieve the pain? That's a good instinct: hydration plays a direct role in kidney function and waste elimination. But not all drinks are equal: some may be unsuitable depending on the cause of the pain or increase the kidneys' workload. Here's what to prioritize and what to avoid.
Kidney pain: why is hydration essential?
The role of kidneys in the body
Your kidneys constantly filter blood to eliminate metabolic waste products, such as urea and creatinine.
Each day, they produce approximately 180 liters of glomerular filtrate (the liquid resulting from the first stage of blood filtration), of which over 99% is then reabsorbed by the body to form only about 1 to 2 liters of urine.
They also participate in the regulation of water, sodium, potassium, phosphorus, and other electrolytes essential for proper body function.
Kidneys also play a key role in maintaining blood pressure and acid-base balance.
Dehydration and kidney pain
When your body lacks water, it sets up mechanisms to limit water loss. Kidneys notably increase water reabsorption under the action of antidiuretic hormone (ADH), which leads to more concentrated and less abundant urine.
This increased concentration of urine can promote, in some people, the formation of urinary stones. These stones can then move into a ureter and cause renal colic, characterized by sudden and intense pain in the flank or lower back.
Good to know: simple dehydration does not systematically cause kidney pain. This can have many other causes.
Kidney pain: what to drink first?
Water: the number one drink
Water remains the go-to drink. It helps maintain sufficient urine volume, dilute urine, and limit the concentration of certain compounds that can promote stone formation. Drink regularly throughout the day, without waiting until you're thirsty.
Beneficial herbal teas for kidneys
Certain plants used in phytotherapy have diuretic properties and can support daily hydration.
This is particularly true for horsetail (EMA, 2016), recognized by the European Medicines Agency for its traditional use to increase urine flow in minor urinary disorders. Cherry stems and stinging nettle are also used as supplements, although scientific data remains more limited.
Caution: these herbal teas do not replace medical treatment. Consult your doctor if you are taking medication or suffer from a kidney condition.
Naturally draining drinks
To vary your fluid intake, certain drinks like green tea, dandelion tea, or lemon water can be consumed.
Kidney pain: what to drink depending on the cause?
In case of dehydration
If your urine is dark and concentrated, gradually increase your water intake. Pale yellow urine generally indicates sufficient hydration. Before, during, and after prolonged exercise or in hot weather, drink a beverage enriched with electrolytes to compensate for losses due to sweating.
In case of kidney stones
Outside of crises, water remains the preferred drink to keep urine sufficiently diluted. According to a narrative review published in the journal Nutrients, drinks rich in citrate, such as orange juice or lemon juice, may also be beneficial for some people prone to calcium stones.
If you have kidney pain, avoid drinking large quantities. Drink normally and consult a healthcare professional quickly.
In case of urinary or kidney infection
If you suffer from a bacterial kidney infection, such as pyelonephritis, regular hydration is essential to eliminate bacteria from the urinary tract. However, it is imperative to follow the antibiotic treatment prescribed by your doctor: water alone cannot cure an established bacterial infection.
In preventing recurrent urinary tract infections, cranberry juice can be helpful for some people. It contains compounds that may prevent certain pathogenic bacteria, such as Escherichia coli, from attaching to bladder walls (Fusco et al., 2024). Opt for pure juice without added sugars, as industrial nectars are too diluted and too sweet to be effective.
Kidney pain: which drinks to absolutely avoid?
Irritating drinks for the kidneys
Alcohol should be limited in case of kidney problems or dehydration. It does not directly "irritate" the kidneys, but excessive consumption can disrupt the body's fluid balance and increase their strain.
Excesses to avoid
Coffee can be consumed in moderation. For people with healthy kidneys, moderate consumption generally does not seem to pose a problem. However, excessive caffeine can temporarily increase blood pressure in some individuals.
Sweet industrial juices, sodas, and energy drinks should be limited. Their high sugar content, and sometimes caffeine or phosphates depending on the products, does not promote good kidney health and can be part of a long-term unfavorable diet.
How much should you drink when you have kidney pain?
The amount of water to consume depends on your health status, physical activity, and climatic conditions. The European Food Safety Authority (EFSA) recommends 2 liters for women and 2.5 liters for men per day, including drinks and food. These needs increase in case of heat, physical activity, or significant fluid loss.
In case of a history of urinary stones, international recommendations advise drinking enough to produce at least 2 to 2.5 liters of urine per day.
Special case of kidney failure: If your kidney pain is related to advanced or end-stage chronic kidney failure, the situation changes completely. In this specific case, only your attending physician or nephrologist will determine the fluid restriction strictly adapted to your case.
When should you consult a doctor for kidney pain?
Pain in the kidney area should never be ignored. While some causes are benign, others require prompt management to avoid serious complications.
Warning signs
Consult a doctor immediately if you experience any of the following symptoms:
- intense pain in the back or flank;
- a fever above 38.5 °C, with or without chills;
- blood in the urine (hematuria);
- persistent nausea or vomiting;
- difficulty urinating or an absence of urine for more than 24 hours.
These symptoms may indicate infections or diseases requiring medical treatment. Hydration alone is not enough.
In case of confusion, malaise, breathing difficulties, or signs suggesting sepsis, call emergency services immediately.
Preventing kidney pain daily
Drink regularly throughout the day, without waiting until you're thirsty. For many people, the sensation of thirst only appears when dehydration is already present.
Maintain a balanced diet, rich in fruits and vegetables, and limit excessive sodium (salt). High sodium consumption can promote the formation of certain kidney stones.
If you are prone to urinary stones, your doctor may advise you to adjust your consumption of animal proteins depending on the type of stone.
Finally, in cases of a history of stones, frequent kidney pain, or chronic treatment, a regular kidney check-up, including blood creatinine and urea levels, allows for monitoring kidney function. This monitoring is crucial for detecting any abnormality at an early stage.
FAQ – Frequently Asked Questions
Kidney pain: what to drink for quick relief?
Water is the drink to prioritize first. However, consult a doctor quickly if the pain is intense, comes on suddenly, or is accompanied by fever or blood in the urine.
Is lemon water good for the kidneys?
Yes, to some extent. The citrate it contains can limit the formation of new calcium stones by binding to urinary calcium. However, it does not dissolve an already formed stone and does not replace treatments prescribed by a healthcare professional.
Which herbal tea is best for kidneys?
Horsetail, cherry stems, and stinging nettle are traditionally used in phytotherapy for their diuretic effect. In case of kidney disease, pregnancy, or medication, always seek your doctor's advice.
Can you drink coffee when you have kidney pain?
In moderation, two to three cups a day, coffee is generally tolerated by healthy kidneys. In case of significant pain or suspicion of a kidney problem, prioritize water and seek medical advice.
Can drinking a lot worsen a kidney problem?
In cases of advanced kidney failure or dialysis, excessive fluid intake can be dangerous. In these situations, only your nephrologist can determine the appropriate amounts for your health condition.
Conclusion
When dealing with kidney pain, hydration is a fundamental pillar of management: drinking enough water, regularly and adapted to your situation, remains the most effective measure. Lemon water or certain herbal teas can supplement this hydration, without replacing medical treatment.
It is important to remember that no drink can cure kidney pain, dissolve an already formed stone, or treat chronic kidney disease.
In the presence of persistent pain, fever, blood in the urine, or a significant decrease in urine volume, consult a doctor quickly. Hydration is only a first step: a medical diagnosis remains essential.
Bibliography
Kaufman, D. P., Basit, H., & Knohl, S. J. (2023). Physiology, glomerular filtration rate. In StatPearls [Internet]. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK500032/
Ameli.fr. (2024). Colique néphrétique (calcul rénal ou urinaire). https://www.ameli.fr/hauts-de-seine/assure/sante/urgence/pathologies/colique-nephretique-calcul-renal-urinaire
Barghouthy, Y., et al. (2025). The role of citrus juice in reducing calcium kidney stone risk : a systematic review and meta-analysis of clinical trials. African Journal of Urology, 31. https://link.springer.com/article/10.1186/s12301-025-00542-6
Johnson, E. C., et al. (2021). Hydration for health hypothesis : a narrative review of supporting evidence. Nutrients, 13(4), 1229. https://pmc.ncbi.nlm.nih.gov/articles/PMC7987589/
European Medicines Agency, Committee on Herbal Medicinal Products. (2016). Equiseti herba : herbal medicinal product. European Medicines Agency. https://www.ema.europa.eu/en/medicines/herbal/equiseti-herba
Fusco, F., et al. (2024). Cranberry juice, cranberry tablets, or liquid therapies for urinary tract infection: A systematic review and network meta-analysis. European Urology Focus. https://pubmed.ncbi.nlm.nih.gov/39030132/
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