What could be affecting your kidneys, and when should you consult a doctor?
Your kidneys are two vital organs that filter waste and extra fluid from your blood, balance minerals (such as sodium and potassium), help control blood pressure, support red blood cell production, and maintain healthy bones. Because they perform many important functions, problems affecting the kidneys can sometimes develop slowly without obvious symptoms.
Common factors that can affect your kidneys
1. High blood pressure (Hypertension)
High blood pressure is one of the leading causes of kidney damage. When blood pressure stays high for a long time, it can damage the small blood vessels inside the kidneys. Damaged kidneys may become less able to remove waste and regulate fluid balance, which can further increase blood pressure.
Risk factors:
- Long-term uncontrolled blood pressure
- Family history of kidney disease
- High salt intake
- Lack of physical activity
What to do:
Regular blood pressure checks and following your doctor’s treatment plan can help protect kidney function.
2. Diabetes
Diabetes is one of the most common causes of chronic kidney disease. High blood sugar levels can damage the kidney’s filtering units over time. Early kidney damage from diabetes may not cause symptoms, which is why regular screening is important.
Signs that may appear later:
- Protein in urine
- Swelling in feet or ankles
- Fatigue
- Changes in urination
Prevention:
Keeping blood sugar under control, maintaining a healthy weight, and having regular kidney tests are important.
3. Dehydration
Not drinking enough fluids can reduce blood flow to the kidneys and make it harder for them to remove waste. Severe dehydration can contribute to kidney injury.
Causes of dehydration:
- Excessive sweating
- Vomiting or diarrhea
- Fever
- Not drinking enough water
Warning signs:
- Dark-colored urine
- Dizziness
- Dry mouth
- Reduced urination
4. Kidney stones
Kidney stones are hard deposits that form from minerals and salts in the urine. They can block urine flow and cause severe pain.
Symptoms:
- Sharp pain in the side or back
- Pain that moves toward the lower abdomen or groin
- Blood in urine
- Nausea or vomiting
- Painful urination
Small stones may pass naturally, but larger stones may require medical treatment.
5. Urinary tract infections (UTIs) and kidney infections
A bladder infection can sometimes spread to the kidneys and cause a more serious infection.
Symptoms of a kidney infection may include:
- Fever and chills
- Pain in the back or side
- Burning during urination
- Frequent urge to urinate
- Cloudy or foul-smelling urine
Kidney infections usually require medical treatment to prevent complications.
6. Medications and supplements
Some medicines can affect kidney function, especially when taken frequently, in high doses, or by people who already have kidney problems.
Examples include:
- Certain pain relievers, especially frequent use of nonsteroidal anti-inflammatory drugs (NSAIDs)
- Some antibiotics
- Certain prescription medications
- Some herbal supplements
Always tell your doctor about all medicines and supplements you take.
7. Chronic kidney disease (CKD)
Chronic kidney disease means the kidneys gradually lose their ability to function properly. It may progress slowly over months or years.
Common causes:
- Diabetes
- High blood pressure
- Repeated kidney infections
- Certain inherited conditions
- Long-term kidney damage
Possible symptoms in later stages:
- Swelling
- Tiredness
- Nausea
- Poor appetite
- Trouble concentrating
- Changes in urination
8. Autoimmune diseases
Some immune system disorders can mistakenly attack the kidneys and cause inflammation.
Examples include:
- Systemic lupus erythematosus (lupus)
- Certain types of vasculitis
Symptoms may vary and often require specialist evaluation.
9. Family history and genetic conditions
Some kidney problems can run in families, such as inherited cyst-forming diseases or structural kidney abnormalities.
People with a family history of kidney disease may need regular monitoring.
10. Lifestyle factors
Certain habits can increase kidney stress over time:
- Smoking
- Excess alcohol use
- High-salt diets
- Poorly controlled weight
- Lack of exercise
- Frequent dehydration
Healthy lifestyle choices help reduce kidney disease risk.
When should you consult a doctor?
You should seek medical advice if you experience:
Urinary changes
- Blood in urine
- Foamy urine (possible protein leakage)
- Very dark urine
- Much more or much less urine than usual
- Pain or burning during urination
Pain or swelling
- Persistent pain in the side or lower back
- Swelling around the eyes, feet, ankles, or hands
General symptoms
- Unusual tiredness
- Nausea or vomiting
- Loss of appetite
- Shortness of breath
- Difficulty concentrating
Medical conditions that require kidney monitoring
Talk to your doctor regularly if you have:
- Diabetes
- High blood pressure
- Heart disease
- A family history of kidney disease
- Frequent kidney stones
- Long-term use of medicines that may affect kidneys
What tests can doctors use to check kidney health?
A doctor may recommend:
- Blood tests:
- Creatinine level
- Estimated glomerular filtration rate (eGFR), which estimates how well kidneys filter blood
- Urine tests:
- Protein or blood in urine
- Signs of infection
- Imaging tests:
- Ultrasound or other scans to look for stones, blockages, or structural problems
Seek urgent medical care if you have:
- Severe side or back pain with fever
- Inability to urinate
- Blood in urine with significant symptoms
- Sudden swelling or shortness of breath
- Confusion, extreme weakness, or severe illness symptoms
Early detection and treatment can often slow or prevent worsening kidney problems. If you are concerned about your kidneys, a healthcare professional can evaluate your symptoms and perform the appropriate tests.