17 Signs of KIDNEY DISEASE You Can See: Doctor Explains

Key Concepts:

• Chronic Kidney Disease (CKD): Gradual loss of kidney function.
• Glomerulus: Tiny filters in the kidneys that filter blood.
• Podocytes: Specialized cells in the glomerulus that create a living filter.
• Albumin: A protein in the blood that helps retain fluid in blood vessels.
• Pitting Edema: Swelling, often in the legs and feet, due to fluid leakage.
• Nocturia: Frequent urination at night.
• Half and Half Nails: A nail condition associated with kidney disease, characterized by two distinct colors.
• Phosphate: A mineral regulated by the kidneys; high levels can cause complications.
• Calcinosis Cutis: Calcium phosphate deposits in the skin.
• Calciphylaxis: Calcium phosphate deposits in blood vessels, leading to tissue damage.
• FGF-23: A hormone that regulates phosphate levels.
• Parathyroid Hormone: A hormone released when calcium levels are low, leading to bone breakdown.
• Osteoporosis: Weak, brittle bones due to calcium loss.
• Uremia: Accumulation of toxins in the blood due to kidney dysfunction.
• PAR2: An itch receptor that can be activated by uremic toxins.
• Restless Leg Syndrome: A condition causing an urge to move legs, often due to iron deficiency.
• Hepsidin: A hormone that regulates iron levels, elevated in kidney disease.
• Chemoceptor Trigger Zone: An area in the brain that detects toxins and triggers vomiting.
• Uremic Frost: A late-stage finding where urea crystals are deposited on the skin.
• Pericarditis: Inflammation of the pericardium, the sac surrounding the heart.
• Erythropoietin (EPO): A hormone produced by the kidneys that stimulates red blood cell production.

1. Early Detection and Prevalence of Kidney Disease

• Kidney disease is common and often goes undiagnosed.
• Up to 90% of people with chronic kidney disease (CKD) are unaware they have it.
• Early detection is crucial for effective treatment and preventing further kidney damage.

2. Kidney Functions

• Kidneys filter toxins from the blood and eliminate them through urine.
• They regulate electrolyte levels (salt, potassium).
• They balance acid levels in the blood.
• They control hemoglobin levels.
• They maintain bone health.

3. Sign 1: Foamy Urine

• Persistent, dense white foam in urine, resembling beer foam, indicates albumin leakage.
• Albumin is a protein that should remain in the blood.
• The glomerulus, a network of tiny blood vessels in the kidney, filters blood.
• Podocytes, specialized cells with tentacle-like structures, form a living filter in the glomerulus.
• Damage to podocytes causes gaps in the filter, allowing albumin to leak into the urine.
• Albumin's soap-like structure creates the characteristic foam.

4. Sign 2: Pitting Edema (Swelling)

• Test for pitting edema by pressing a thumb into the lower shin bone for 5 seconds and observing if an indent remains.
• Albumin in the blood helps retain fluid within blood vessels through osmosis.
• When albumin leaks into the urine, fluid leaks out of blood vessels into tissues, causing swelling.
• Swelling is often noticed in the legs and feet due to gravity, but can also occur around the eyes.
• Kidneys may retain salt and water in response to perceived dehydration, worsening the swelling.
• Severe cases can lead to fluid in the lungs, causing breathing difficulties.
• Leg swelling can have other causes, but persistent or pronounced swelling, especially around the eyes, warrants a kidney checkup.

5. Sign 3: Nocturia (Frequent Nighttime Urination)

• Contrary to the myth that frequent urination indicates healthy kidneys, it can be a sign of kidney problems.
• Kidneys lose the ability to concentrate urine, especially at night.
• Normally, kidneys produce concentrated urine overnight due to the hormone ADH.
• Nocturia, or getting up multiple times at night to urinate, can be an early sign of kidney disease.

6. Sign 4: Half and Half Nails

• Normal nails have a lighter area at the base called the lunula.
• Half and half nails in CKD patients show two distinct colors, but the lighter area is not a normal lunula, and the other half has a reddish-brown color.
• The exact cause is unknown, but there's a clear association with kidney disease.

7. Sign 5: Calcinosis Cutis (Calcium Deposits in the Skin)

• High phosphate levels in the blood, due to impaired kidney function, can lead to calcium phosphate crystal formation.
• These crystals can deposit in the skin, causing calcinosis cutis, which presents as whitish-yellow, hard, painless bumps.
• In severe cases, the bumps can break open, releasing a toothpaste-like substance.
• Calcinosis cutis can also be seen in autoimmune diseases.

8. Sign 6: Calciphylaxis (Calcium Deposits in Blood Vessels)

• Calcium phosphate crystals can deposit in blood vessels, leading to calciphylaxis.
• Calciphylaxis blocks blood vessels, depriving organs and tissues of oxygen.
• It can be a medical emergency and potentially fatal.

9. Sign 7: Arterial Calcification

• High phosphate levels can cause smooth muscle cells in artery walls to transform into bone cells.
• These cells deposit calcium phosphate, hardening the arteries.
• The hardened arteries can be felt under the skin, resembling a guitar string.

10. Sign 8: Muscle Cramps

• High phosphate levels trigger the release of FGF-23, which causes the kidneys to excrete phosphate and the intestines to absorb less calcium.
• Low calcium levels can lead to muscle cramps, especially at night.
• Low magnesium and high blood acidity can also contribute to muscle cramps.
• Unexplained muscle cramps, not related to exercise, warrant a kidney function and electrolyte check.

11. Sign 9: Osteoporosis (Weak Bones)

• Low calcium levels trigger the release of parathyroid hormone, which breaks down bone to release calcium.
• Over time, this leads to weak, brittle bones (osteoporosis).
• Height loss is a red flag for osteoporosis.
• Fractures from standing height are a clear sign, especially in the wrist, spine, or hips.

12. Sign 10: Itchy Skin (Pruritus)

• Uremia, the buildup of toxins in the blood, can cause relentless, whole-body itching, often worse at night.
• Uremic toxins irritate the skin and activate itch receptors (PAR2), making nerve endings hypersensitive.
• Toxins can also affect the brain, chronically activating itch circuits.

13. Sign 11: Restless Leg Syndrome

• Restless leg syndrome causes an overwhelming urge to move the legs, especially at night.
• The leading theory is that low iron levels in the brain reduce dopamine production.
• Uremic toxins cause inflammation, leading to the production of hepsidin.
• Hepsidin stores iron and prevents its absorption, starving the body of iron and causing restless leg syndrome.

14. Sign 12: Metallic Taste and Uremic Breath

• Uremia can cause a metallic taste in the mouth.
• Urea in saliva is broken down into ammonia and other compounds by oral bacteria.
• These byproducts stimulate taste receptors, causing a metallic taste.
• The same compounds can cause uremic breath, which smells like urine.

15. Sign 13: Loss of Appetite, Nausea, and Vomiting

• Uremic toxins directly affect the brain by activating the chemoceptor trigger zone, which detects toxins.
• This triggers a loss of appetite, nausea, and vomiting.
• Over time, this can lead to unintentional weight loss.

16. Sign 14: Easy Bruising

• Uremic toxins make platelets less sticky, impairing blood clotting.
• This leads to easy bruising, frequent nosebleeds, and bleeding gums.

17. Sign 15: Uremic Frost

• Uremic frost is a late-stage finding where urea crystals are deposited on the skin.
• Sweat becomes highly concentrated with urea and other toxins, leaving a fine white powder on the skin when it dries.
• It indicates advanced kidney failure.

18. Sign 16: Pericarditis

• Uremic toxins can cause inflammation of the pericardium (the sac around the heart).
• The inflamed pericardium rubs against the heart, causing pain.
• A scratchy sound can be heard with a stethoscope.

19. Sign 17: Fatigue

• Fatigue is a common symptom of CKD.
• It can be caused by poor sleep (muscle cramps, itchy skin, restless leg syndrome), electrolyte imbalances, and uremic toxin buildup.
• Kidneys produce erythropoietin (EPO), which stimulates red blood cell production.
• Low EPO levels lead to anemia, causing fatigue.
• Synthetic EPO injections can reverse anemia.

20. Sign 18: No Symptoms at All

• Many people with CKD experience no symptoms until stage 3 or later.
• CKD is often detected incidentally through blood work or urine testing.
• Prevention is key.

21. Causes of Kidney Disease

• Diabetes and high blood pressure are the most common causes.
• Overuse of medications like ibuprofen and naproxen can also damage the kidneys.

22. Conclusion

• The video emphasizes the importance of understanding kidney function and recognizing potential signs of kidney disease.
• Early detection and prevention are crucial for maintaining kidney health.