Kidney Health, Symptoms, and Expert Private GP Care in Dorset

Medical Review: Dr Mehrdad Bordbar BMBS MMedSc MRCGP AFMCP GMC 7456052

Last Updated: 28 May 2026

Clinic Location: Olivine Clinic, 5 Hamslade Green, Poundbury, Dorchester, DT1 3DP

The Bottom Line (Key Takeaway):

Your kidneys are essential organs responsible for filtering waste from your blood, regulating blood pressure, and balancing fluid levels. While acute issues like kidney stones or infections (pyelonephritis) cause immediate, severe symptoms, Chronic Kidney Disease (CKD) is often entirely asymptomatic in its early stages. Proactive screening—utilising advanced blood tests, microalbumin urine testing, and Point-of-Care Ultrasound (POCUS)—is vital for early detection and preserving long-term kidney function.

Introduction: The Silent Engines of Your Body

When we think of vital organs, the heart and lungs often take centre stage. However, the kidneys are the unsung heroes of human physiology. Operating quietly in the background, these twin organs perform a highly complex, non-stop filtration process that keeps our internal environment stable and toxin-free.

Because the kidneys are so efficient, they can lose a significant amount of their function before you ever feel unwell. This phenomenon makes kidney health a prime target for proactive, preventative medicine. Waiting for symptoms to appear is often waiting too long.

At the Olivine Clinic in Poundbury, Dorchester, Dr Mehrdad Bordbar takes a uniquely thorough, investigative approach to kidney health. By integrating advanced biochemistry with cutting-edge Point-of-Care Ultrasound (POCUS) during his consultations, Dr Bordbar eliminates the "guesswork" traditionally associated with primary care, allowing for precise, safe, and immediate clinical decision-making.

This comprehensive guide will explain exactly how your kidneys function, how to identify acute emergencies, the creeping threat of chronic conditions, and how you can actively protect your renal health.

What Do the Kidneys Do? Anatomy and Function

To understand why kidney health is so vital, we must first understand how they work and where they are located.

Location and Structure

You have two kidneys, each roughly the size of a fist and shaped like a bean. They are located at the back of your abdomen, just below the ribcage, on either side of your spine. This area is known as the retroperitoneal space. Because of their location, kidney pain is often felt in the middle-to-lower back or the sides (the flanks), rather than in the front of the stomach.

The Filtration Process

The primary job of the kidneys is to filter your blood. Every minute, about 1.2 litres of blood (a quarter of all the blood pumped by your heart) passes through the kidneys.

Inside each kidney are about one million microscopic filtering units called nephrons. Each nephron contains a tiny cluster of blood vessels known as a glomerulus, attached to a tubule. As blood flows through the glomerulus, it acts as a sieve. Fluid and waste products are pushed out of the blood and into the tubule. As this fluid travels down the tubule, essential minerals, nutrients, and water that your body needs are reabsorbed into the bloodstream. The remaining waste and excess fluid become urine, which travels down tubes called ureters into your bladder to be excreted.

Beyond Filtration: Hormonal and Regulatory Roles

The kidneys do far more than just make urine. They act as a central command centre for several critical bodily functions:

  *Regulating Blood Pressure:** The kidneys produce an enzyme called renin, which helps control blood pressure by managing blood vessel constriction and fluid volume.

  *Red Blood Cell Production:** When the kidneys detect low oxygen levels, they release a hormone called erythropoietin (EPO), which signals the bone marrow to produce more oxygen-carrying red blood cells.

  *Bone Health:** The kidneys convert Vitamin D from supplements or the sun into its active form (calcitriol), which is essential for absorbing calcium and keeping bones strong.

  *Acid-Base Balance:** They keep the pH of your blood tightly regulated, preventing it from becoming too acidic or too alkaline.

Acute Kidney Problems: Symptoms You Shouldn't Ignore

While chronic kidney issues develop slowly, acute kidney problems happen suddenly and often present with dramatic, distressing symptoms. Recognising these signs immediately can save you from severe complications.

Kidney Stones (Nephrolithiasis)

Kidney stones are hard collections of salt and minerals (often calcium oxalate or uric acid) that form inside the kidney. When these stones remain in the kidney, they may cause no symptoms. However, when a stone drops into the ureter (the narrow tube connecting the kidney to the bladder), it can cause a blockage.

Typical Symptoms:

  *Renal Colic:** An excruciating, cramping pain in the back or side that comes in waves. The pain often radiates down to the lower abdomen or groin.

 * Restlessness (patients with kidney stones often cannot find a comfortable position).

 * Nausea and vomiting due to the intensity of the pain.

 * Blood in the urine (haematuria), which may make the urine look pink, red, or brown.

Kidney Infections (Pyelonephritis)

A kidney infection, medically known as pyelonephritis, usually begins as a standard lower urinary tract infection (UTI) or bladder infection that travels upwards through the ureters into one or both kidneys. This is a serious condition that requires prompt antibiotic treatment to prevent permanent kidney scarring or sepsis.

Typical Symptoms:

 * A sudden, high fever (often above 38°C) accompanied by shivering or chills (rigors).

 * A persistent, dull ache in the back, side, or groin.

 * Pain or a burning sensation when urinating (dysuria).

 * Cloudy, dark, or foul-smelling urine.

 * Frequent and urgent need to urinate.

Blood in the Urine (Haematuria) and Ruling Out Kidney Cancer

Noticing blood in your urine can be highly alarming. This is known as macroscopic (visible) haematuria. Sometimes, blood is only detectable via a urine dipstick test under a microscope, which is called microscopic (non-visible) haematuria.

While blood in the urine is commonly caused by benign issues like a UTI, a kidney stone, or an enlarged prostate in men, it must always be thoroughly investigated.

The Risk of Kidney Cancer:

Rarely, painless blood in the urine is the first, and sometimes only, warning sign of kidney cancer (such as Renal Cell Carcinoma) or bladder cancer. Other late-stage symptoms of kidney cancer might include a lump in the side or abdomen, unexplained weight loss, night sweats, and persistent fatigue.

Standard of Care: If you present with unexplained visible blood in your urine, or persistent non-visible blood, NHS guidelines and safe clinical practice dictate that we must "rule out" cancer first. At the Olivine Clinic, Dr Bordbar takes haematuria very seriously, initiating rapid diagnostic pathways, utilising point-of-care ultrasound, and arranging swift specialist referrals when red flags are present to ensure nothing is missed.

Chronic Kidney Disease (CKD): The Silent Threat

Unlike acute conditions, Chronic Kidney Disease (CKD) is a long-term condition where the kidneys do not work as well as they should. The term "chronic" does not necessarily mean the condition is instantly life-threatening; rather, it signifies that the condition is persistent and long-lasting.

Why is CKD Asymptomatic?

In its early stages (Stages 1 to 3), CKD is almost entirely asymptomatic. Because the kidneys have a vast reserve capacity, they will continue to clear waste adequately even when damaged. It is not until the later stages (Stages 4 and 5), when toxins build up significantly in the blood (uraemia), that symptoms become noticeable. These late-stage symptoms include severe tiredness, swollen ankles, feet, or hands (oedema), shortness of breath, nausea, and itchy skin.

Because it creeps up on you, CKD is usually only detected through routine blood and urine tests.

What Causes CKD?

Several common health factors place chronic stress on the kidneys over years or decades:

  *Ageing:** Just as our skin and joints age, so do our organs. As we get older, there is a natural, gradual decline in our kidney function. However, lifestyle and medical management dictate how rapid or severe this decline is.

  *Diabetes (Diabetic Nephropathy):** Consistently high blood sugar levels act like microscopic shards of glass, damaging the delicate blood vessels in the kidneys' filtering units (glomeruli) over time. Diabetes is one of the leading causes of kidney failure worldwide.

  *Uncontrolled High Blood Pressure (Hypertension):** High blood pressure forces blood through the delicate vessels of the kidneys at an unnatural force, causing them to stiffen, narrow, or weaken over time. Conversely, because the kidneys regulate blood pressure, damaged kidneys can cause blood pressure to rise further, creating a vicious cycle.

Protecting Your Kidney Health: Everyday Rules and Risk Management

Looking after your kidneys requires a proactive approach to hydration and a careful understanding of how medications affect renal function.

The Importance of Hydration

Your kidneys require adequate fluid to maintain the pressure needed to filter blood effectively. On a hot day, or during intense exercise, you lose significant fluid through sweat. If this fluid is not replaced, you become dehydrated.

Dehydration causes a drop in blood volume and blood pressure. To compensate, the blood vessels leading to the kidneys constrict, drastically reducing the filtration rate. Severe or prolonged dehydration can lead to acute kidney injury (AKI), a sudden drop in kidney function that can cause lasting damage. Ensuring you are drinking enough water—especially when the weather is warm—is the simplest and most effective way to support your kidneys.

The Danger of Nephrotoxic Medications (NSAIDs)

Many people are unaware that common over-the-counter painkillers can be highly toxic to the kidneys (nephrotoxic) if used excessively. Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), such as Ibuprofen, Naproxen, and Diclofenac, work by blocking prostaglandins—chemicals that cause inflammation and pain.

However, prostaglandins also play a crucial role in keeping the blood vessels leading to the kidneys dilated (open). Taking too many NSAIDs constricts these vessels, starving the kidneys of blood flow. Dr Bordbar strongly advises reviewing your reliance on over-the-counter anti-inflammatories and discussing safer, long-term pain management strategies during your consultation.

Prescribed Medications and the "Sick Day Rules"

If you have underlying health conditions like high blood pressure, heart disease, or diabetes, you may be on prescribed medications that alter how your kidneys manage fluid and pressure. While highly protective when you are well, these medications can become dangerous if you suddenly become severely unwell or dehydrated (e.g., from a stomach bug causing vomiting and diarrhoea).

To prevent Acute Kidney Injury (AKI), the NHS and NICE advocate for Medicine Sick Day Rules. If you develop a dehydrating illness, you should temporarily pause taking the following medications until you have been eating and drinking normally for 24 to 48 hours:

  *ACE Inhibitors:** (Medicines ending in '-pril', e.g., Ramipril, Lisinopril).

  *ARBs:** (Medicines ending in '-sartan', e.g., Losartan, Candesartan).

  *Diuretics:** ("Water pills" like Furosemide or Indapamide).

  *Metformin:** (A diabetes medication. Dehydration increases the risk of a dangerous condition called lactic acidosis).

  *SGLT2 Inhibitors:** (Medicines ending in '-flozin', e.g., Dapagliflozin. Dehydration can increase the risk of acid build-up in the blood).

  *NSAIDs:** (Ibuprofen, Naproxen).

Always ensure you have a sick day plan discussed with your doctor, and do not stop routine medications permanently without medical advice.

Dr Bordbar’s Approach: Proactive Screening and Comprehensive Health MOTs

Because kidney disease is a "silent" condition in its infancy, proactive screening is non-negotiable for optimal health. Dr Mehrdad Bordbar incorporates kidney health awareness into all his consultations at the Olivine Clinic.

If you book a standard or extended comprehensive Health MOT, your kidneys are fundamentally assessed. But how do we accurately measure something we cannot easily see or feel?

Advanced Laboratory Testing

Dr Bordbar does not just rely on standard, basic markers; he looks deeper into your biochemistry:

 1. eGFR (Estimated Glomerular Filtration Rate): This blood test calculates exactly how many millilitres of waste your kidneys are filtering per minute. Following the latest 2026 NICE guidelines, this is calculated using the modern CKD-EPI formula to accurately stage kidney function (from normal Stage 1 down to severe Stage 5), without outdated ethnic adjustments, ensuring equitable and precise care.

 2. Specialist Microalbumin Urine Tests (uACR): A Urine Albumin-to-Creatinine Ratio (uACR) test is one of the most sensitive early warning systems for kidney damage. Albumin is a protein that belongs in the blood. If the kidney's microscopic filters (glomeruli) are damaged by high blood pressure or diabetes, they start to "leak" tiny amounts of this protein into the urine (microalbuminuria). Detecting this leak early allows Dr Bordbar to intervene with protective medications long before your eGFR begins to drop.

The Revolution in Primary Care: Point-of-Care Ultrasound (POCUS)

Perhaps the most revolutionary aspect of Dr Bordbar’s practice at the Olivine Clinic is the integration of Point-of-Care Ultrasound (POCUS) directly within the GP consultation room.

Historically, in traditional primary care, if a patient presented with flank pain or suspected kidney issues, the GP would have to examine the patient, make an educated guess, and write a referral for a hospital ultrasound—a process that could involve weeks of waiting and anxiety.

Without an ultrasound, you are guessing. With POCUS, you are diagnosing.

If you attend the Olivine Clinic with symptoms suggestive of kidney disease, Dr Bordbar can immediately apply an ultrasound probe to your abdomen to visualise your kidneys in real-time. This provides invaluable data for safe clinical decision-making and safety netting:

  *Detecting Hydronephrosis (Blockage):** If a kidney stone drops into the ureter and blocks urine from draining, the kidney swells up with fluid. This swelling is called hydronephrosis. Using POCUS, Dr Bordbar can instantly see if a kidney is swollen, confirming a blockage and allowing for immediate, targeted treatment or urgent urology referral.

  *Visualising Kidney Stones:** Larger stones within the kidney itself cast a distinct acoustic shadow on an ultrasound screen, allowing them to be identified quickly.

  *Identifying Cysts and Masses:** The ultrasound can easily differentiate between simple, harmless fluid-filled cysts, the multiple cysts associated with Polycystic Kidney Disease (PKD), or solid masses that require urgent cancer pathways.

  *Assessing Kidney Size:** Kidneys that have been damaged by chronic disease over many years physically shrink. Measuring the dimensions of the kidneys provides immediate insight into the chronicity of a patient's condition.

The data gathered from an immediate ultrasound is completely invaluable. It allows Dr Bordbar to offer reassurance on the spot when scans are clear, or expedite life-saving secondary care when serious pathology is identified. This level of comprehensive assessment is included where clinically indicated in every standard or extended consultation.

Summary and Next Steps

Your kidneys are complex, vital organs that demand respect and proactive care. Because chronic kidney damage is irreversible and early disease is entirely asymptomatic, you cannot rely on feeling unwell to tell you it is time to see a doctor.

By maintaining good hydration, being cautious with over-the-counter painkillers, adhering to "sick day rules," and managing your blood pressure and blood sugar, you can protect your kidneys for decades to come.

If you have any concerns regarding your kidney health—whether it is a family history of kidney disease, acute flank pain, or simply a desire to ensure your body is functioning optimally—Dr Mehrdad Bordbar and the team at Olivine Clinic are here to provide unmatched, comprehensive private medical care.

Take Control of Your Health Today

Do not wait for symptoms to appear. Whether you need to discuss specific concerns or want the peace of mind that comes with a full physiological overhaul, we are ready to assist you in Poundbury, Dorchester.

  *Specific Medical Concerns?** If you are experiencing symptoms, have concerns about your kidney function, or need expert management of a chronic condition, book a direct consultation.

   Book a Private GP Consultation with Dr Bordbar Here

  *Proactive Prevention & Peace of Mind?** If you don't have any particular concerns but want to ensure you are at your absolute optimal health with our advanced blood, urine, and POCUS screenings, book our comprehensive MOT.

   Book a Premium or Standard Health Check MOT Here

Medical Disclaimer: The information provided in this article is for educational and informational purposes only and does not constitute medical advice. While every effort has been made to ensure accuracy in accordance with 2026 NHS and NICE guidelines, individual health circumstances vary. Always consult with a qualified healthcare professional regarding any medical symptoms or treatment plans. If you experience severe, acute pain, high fever, or visible blood in your urine, seek immediate medical attention.