10 Common Kidney Problems – When to Worry and When to See a Doctor 

10 Common Kidney Problems: When to Worry and When to See a Doctor

Kidney disease is common and often silent. This guide explains 10 common kidney problems, their key symptoms, causes, and when to see a doctor or specialist.

1. Urinary Tract Infections (UTIs)

UTIs affect the bladder, kidneys, urethra, or prostate and are usually caused by bacteria such as E. coli.

• Symptoms: Burning or frequent urination, cloudy or bloody urine, pelvic or back pain, fever
• Risk factors: Female sex, pregnancy, diabetes, sexual activity
• Treatment: Antibiotics (guided by urine culture)

When to see a doctor: See your GP for mild UTIs. Recurrent or severe infections require a urologist.

2. Kidney Stones

Kidney stones are hard mineral deposits that can block urine flow and cause severe pain.

• Symptoms: Severe flank or abdominal pain, blood in urine, nausea, fever
• Risk factors: Dehydration, obesity, family history
• Treatment: Pain relief, increased fluids, lithotripsy or surgery

When to see a doctor: All patients should see a urologist.

3. Chronic Kidney Disease (CKD)

CKD is a gradual loss of kidney function (or abnormal structure), often linked to diabetes or high blood pressure.

• Symptoms: Often none early; later fatigue, swelling, itching, breathlessness
• Treatment: Lifestyle changes, blood pressure and diabetes control (dialysis or transplant in advanced stages)

When to see a doctor: CKD stage 3B or worse should be managed by a nephrologist.

4. Acute Kidney Injury (AKI)

AKI is a sudden decline in kidney function, often due to dehydration, infection, or medications.

• Symptoms: Reduced urine output, swelling, electrolyte imbalance
• Treatment: Treat underlying cause, adjust medications, dialysis if severe

When to see a doctor: All patients require hospital admission.

5. Diabetic Nephropathy

A complication of long-standing diabetes causing protein loss and kidney damage.

• Symptoms: Protein in urine, swelling, CKD features
• Treatment: Tight glucose and blood pressure control, ACE inhibitors, SGLT2 inhibitors

When to see a doctor: Advanced disease requires a nephrologist.

6. Polycystic Kidney Disease (PKD)

A genetic condition causing multiple kidney cysts and progressive kidney failure (in 50% of patients).

• Symptoms: Back pain, blood in urine, high blood pressure
• Complications: CKD, infections, aneurysms
• Treatment: Supportive care, blood pressure control, transplant if needed

When to see a doctor: All patients should see a nephrologist.

7. Glomerulonephritis

Inflammation of kidney filters, often autoimmune or infection-related.

• Symptoms: Blood and protein in urine, swelling, high blood pressure
• Treatment: Immunosuppressive drugs, blood pressure control

When to see a doctor: All cases require a nephrologist.

8. Nephrotic Syndrome

A condition marked by heavy protein loss in urine and severe swelling.

• Symptoms: Oedema, weight gain, infections, blood clots
• Treatment: Treat cause, steroids, diuretics, ACE inhibitors +/- anticoagulants

When to see a doctor: Urgent referral to a nephrologist.

9. Obstructive Nephropathy / Hydronephrosis

Kidney damage caused by blocked urine flow.

• Causes: Stones, prostate enlargement, tumours
• Symptoms: Often silent; pain, infection, blood in urine
• Treatment: Surgery, stents, drainage

When to see a doctor: All patients need a urologist (and sometimes a nephrologist).

10. Kidney Cancer

Most kidney cancers are renal cell carcinomas and may be found incidentally.

• Symptoms: Visible blood in urine, flank pain, weight loss
• Diagnosis: CT, MRI or ultrasound
• Treatment: Surgical removal

When to see a doctor: Any visible blood in urine needs urgent GP review and urology referral within 2 weeks.

Key Takeaway

Kidney disease can be silent but serious. Blood in urine, swelling, pain, or abnormal kidney tests should never be ignored. Early diagnosis improves outcomes.

If you’re unsure, start with your GP—they can arrange tests or specialist referral when needed.