Kidney Disease (Chronic Kidney Disease)

The tricky thing about kidney disease is that it's often called a "silent disease" because there are usually NO early symptoms. However, the first signs that may appear include: foamy or bubbly urine (from protein leaking into urine), changes in urination frequency (especially at night), unexplained fatigue, and mild swelling around the eyes in the morning. Often, the first "sign" is an abnormal blood or urine test. That's why screening is crucial if you have diabetes, high blood pressure, or family history—don't wait for symptoms.

Women may experience kidney disease symptoms differently: 1) UTI-like symptoms (burning, frequency) even without infection, 2) Puffiness around eyes, especially in the morning, 3) Unexplained fatigue often dismissed as hormonal, 4) Swelling in ankles and feet, 5) Foamy urine, 6) Back pain below the ribs, 7) Itchy skin, 8) Nausea and loss of appetite. Women with PCOS, pregnancy complications (preeclampsia), or lupus have higher kidney disease risk. Many symptoms are vague and easily mistaken for other conditions, so testing is important.

Stage 3 CKD means moderate kidney function loss. It's divided into two sub-stages: **Stage 3a:** GFR 45-59 (mild-to-moderate) - Your kidneys are working at about 45-59% capacity. Many people at this stage have no symptoms and can maintain this level for years with proper management. **Stage 3b:** GFR 30-44 (moderate-to-severe) - Kidneys working at 30-44% capacity. Risk of complications increases. Both stages require: blood pressure control (<130/80), blood sugar management if diabetic, avoiding NSAIDs, and regular monitoring. With good care, many people never progress to kidney failure.

It depends on the type and cause. **Acute kidney injury (AKI):** Often fully reversible if treated promptly. **Early CKD (stages 1-2):** Can sometimes be reversed if the underlying cause is treated (controlling diabetes/blood pressure). **Advanced CKD (stages 3-5):** Cannot be cured, but progression can be significantly slowed. Some people stay stable for decades. **End-stage (stage 5):** Requires dialysis or transplant. The key is early detection and aggressive management of risk factors. New medications (SGLT2 inhibitors) are game-changers for slowing progression.

Some types are hereditary, others aren't: **Hereditary kidney diseases:** Polycystic kidney disease (PKD) is the most common inherited form—affects 1 in 400-1000 people. Alport syndrome, Fabry disease, and some forms of nephritis can also be inherited. **Non-hereditary but familial risk:** Having a family member with kidney disease increases your risk 2-3x, even without a genetic condition. This may be due to shared risk factors (diabetes, hypertension) or genetic susceptibility. If kidney disease runs in your family, get screened regularly even if you feel fine.

Foamy or bubbly urine CAN be a sign of kidney disease, but not always. **When it suggests kidney problems:** Persistent, excessive foam that looks like the head on a beer—this often indicates protein in the urine (proteinuria), a key sign of kidney damage. The kidneys normally keep protein in your blood, so protein in urine means the filters are damaged. **Normal causes of foam:** Fast urination, dehydration, toilet cleaners. **What to do:** If you consistently notice foamy urine, get a simple urine test to check for protein. It's an easy way to catch kidney disease early.

Olympic gold medalist gymnast Suni Lee has been open about her diagnosis of **IgA Nephropathy** (also called Berger's disease). This is an autoimmune kidney disease where the immune system attacks the kidneys' filtering units. It's one of the most common forms of glomerulonephritis worldwide. Symptoms can include blood in urine, foamy urine, and high blood pressure. Suni Lee's advocacy has raised awareness about kidney disease in young, healthy-appearing athletes. Her story shows that kidney disease can affect anyone, regardless of fitness level.

Early kidney disease usually has NO symptoms—that's why it's called a silent disease. Later symptoms include: fatigue, swelling in feet/ankles, changes in urination (more or less frequent, foamy, or bloody), poor appetite, nausea, difficulty concentrating, muscle cramps, dry itchy skin, and high blood pressure. By the time symptoms appear, significant damage has usually occurred. Key warning signs: foamy urine, swelling, unexplained fatigue, and frequent nighttime urination.

The two leading causes are: 1) **Diabetes** - high blood sugar damages kidney blood vessels (44% of cases), and 2) **High blood pressure** - damages delicate kidney filtering units (28% of cases). Other causes include: glomerulonephritis (kidney inflammation including IgA nephropathy), polycystic kidney disease (inherited), kidney infections, lupus and autoimmune diseases, certain medications (long-term NSAID use), and urinary tract obstructions.

It depends on your stage. **All stages:** Limit sodium (<2,300 mg/day), limit processed foods, avoid excessive protein. **Later stages (3-5):** May need to limit: potassium (bananas, oranges, potatoes, tomatoes), phosphorus (dairy, nuts, colas, processed foods), and protein intake. **Foods to emphasize:** Fresh vegetables (low-potassium varieties), cabbage, cauliflower, apples, berries. Work with a renal dietitian for personalized guidance—restrictions vary by individual and stage.