What is the urinary system, and what is its role?
The urinary system eliminates waste and maintains fluid and electrolyte balance. It consists of:
- Kidneys: filter 180 liters of blood daily to produce 1.5 to 2 liters of urine
- Ureters: carry urine from the kidneys to the bladder
- Bladder: a temporary storage organ with a capacity of 400 to 500 mL in adults
- Urethra: carries urine from the bladder to the outside
This system also plays a role in regulating blood pressure and blood pH, as well as in the production of hormones (erythropoietin, calcitriol). Its health is essential to the body’s overall balance.
What conditions affect the urinary system?
Several conditions can affect the urinary tract:
- Urinary tract infections: cystitis, urethritis, pyelonephritis
- Kidney or bladder stones (lithiasis)
- Functional disorders: overactive bladder, incontinence, urinary retention
- Kidney diseases: acute or chronic kidney failure, nephropathies
- Benign prostatic hyperplasia in men
- Cancers: kidney, bladder, prostate, urinary tract
- Congenital or acquiredmalformations
Any urinary pain, change in urine output, hematuria, or persistent symptom requires a medical evaluation to determine the cause. For acute urinary pain, prompt medical attention is necessary.
What are the risk factors for urinary disorders?
Certain conditions increase the risk of urinary disorders:
- Advanced age: physiological changes in the bladder and kidneys
- Female gender: a short urethra that increases susceptibility to infections
- Family history of kidney disease, polycystic kidney disease, or kidney stones
- Diabetes: increased risk of infections and kidney disease
- Uncontrolledhigh blood pressure
- Obesity and metabolic syndrome
- Chronicinsufficient hydration
- Smoking: a risk factor for bladder cancer
- Long-term treatments: NSAIDs, certain antibiotics, chemotherapy
- Pregnancy with anatomical and hormonal changes
Identifying these personal risk factors guides targeted prevention.
How can urinary tract infections be prevented?
Urinary tract infections, which are particularly common in women, can be prevented with simple steps:
- Drink 1.5 to 2 liters of plain water per day
- Urinate regularly, without holding it in
- Urinating after intercourse to flush out bacteria
- Proper intimate hygiene: mild soap, wiping from front to back
- Wearingcotton underwear and loose-fitting clothing
- Preventing constipation
- Avoid vaginal douches and scented sprays
- Preventive treatment with standardized cranberry extract rich in proanthocyanidins, as advised by a pharmacist
For recurrent infections (at least 4 per year), a specialist consultation is essential.
What are the symptoms of kidney stones, and what are the treatments?
Urinary stones can cause:
- Renal colic: severe, sudden lower back pain radiating to the lower abdomen and genital area
- Associatednausea and vomiting
- Gross or microscopichematuria
- Burning sensation during urination if there is a concurrent infection
- Characteristicrestlessness (inability to find a position that relieves pain)
Treatment depends on the size and location of the stone: strong pain relievers and hydration to facilitate spontaneous passage of small stones; extracorporeal shock wave lithotripsy, ureteroscopy, or nephrolithotomy for large stones. Prevention through hydration, magnesium supplementation, salt restriction, and dietary adjustments based on the type of stone identified.
What foods support urinary health?
Several food groups support healthy urinary function:
- Plenty ofplain water
- Water-rich fruits and vegetables: cucumber, watermelon, cantaloupe, zucchini, tomato
- Potassium-rich foods: bananas, spinach, legumes, potatoes
- Sources of magnesium: nuts, legumes, whole grains
- Natural citrates (citrus fruits in moderation) that inhibit crystallization
- Fiber to prevent constipation, a source of bladder pressure
- Drainage-promoting herbal teas: cherry stems, hibiscus, and nettle as a supplement
Limit: excessive salt, too much animal protein, soda, alcohol, large amounts of caffeine, and foods very high in oxalates for people prone to kidney stones.
How can you maintain healthy kidneys?
Several lifestyle habits help preserve kidney function over the long term:
- Monitor blood pressure (target below 140/90 mmHg, or even lower depending on the situation)
- Monitor blood sugar levels if you have diabetes or prediabetes
- Stay hydrated throughout the day
- Engage in regular, age-appropriatephysical activity
- Maintaining a stable weight
- Limit salt intake (less than 5 to 6 g per day, according to the WHO)
- Drink alcohol in moderation and quit smoking
- Prudent use of NSAIDs (nonsteroidal anti-inflammatory drugs) as directed by a doctor
- Periodic blood tests: serum creatinine, microalbuminuria
According to the HAS, early detection of chronic kidney disease can significantly slow its progression.
What signs of kidney disease should raise a red flag?
Several symptoms may indicate kidney damage:
- Persistent, unexplainedfatigue
- Swelling of the ankles, legs, or face
- Decreased urine output (oliguria) or increased nighttime urination (nocturia)
- Foamy urine (possible proteinuria) or discolored urine
- Breathing difficulties, shortness of breath on exertion
- Widespreadskin itching
- Loss of appetite, persistentnausea
- New-onset or difficult-to-controlhigh blood pressure
- Nighttime leg cramps, sleep disturbances
These symptoms warrant a prompt medical evaluation. According to the French National Health Insurance, chronic kidney disease can progress silently for years before symptoms appear.
What is urinary incontinence and how is it treated?
Urinary incontinence refers to any involuntary leakage of urine. There are several forms:
- Stress incontinence: leakage during physical exertion (coughing, laughing, lifting heavy objects)
- Urge incontinence: an urgent need to urinate that cannot be delayed
- Mixed incontinence, which combines both mechanisms
- Overflow incontinence, related to bladder retention
Treatment depends on the type and severity: pelvic floor rehabilitation with a physical therapist or midwife, lifestyle changes, anticholinergic medications, appropriate absorbent products, and, in some cases, surgery (suburethral slings). Ourincontinence section offers solutions tailored to everyday life. Dehydration worsens incontinence by concentrating urine: stay well-hydrated despite leaks.
When should you see a urinary health specialist?
A consultation with a specialist (urologist, nephrologist, or gynecologist) is necessary in several situations:
- Persistent or recurringurinary symptoms despite simple treatments
- Confirmed gross or microscopichematuria
- Recurrent urinary tract infections (at least 4 per year)
- Recurrent kidney stones or when a metabolic workup is necessary
- Persistenturinary difficulties (weak stream, retention)
- Incontinence affecting quality of life
- Family history of urological cancer or kidney disease
- Abnormal laboratory findings (elevated serum creatinine, proteinuria)
- Preparation for urological surgery
- Specializedpostoperative follow-up
If in doubt, your primary care physician will refer you to the appropriate specialist. To support daily urinary comfort, your licensed pharmacist can also recommend appropriate supplements in accordance with the recommendations of health authorities (HAS, ANSM, Inserm).
