1. Heart failure signs
Swollen feet can be an early symptom of congestive heart failure, a serious condition where the heart is unable to pump blood efficiently. When the heart’s pumping capacity decreases, blood can back up in the veins, causing fluid to leak into surrounding tissues, especially in the lower extremities.
This swelling, medically known as peripheral edema, often starts in the feet and ankles and may worsen throughout the day. Other warning signs of heart failure include shortness of breath, fatigue, rapid or irregular heartbeat, and persistent coughing or wheezing.
Early diagnosis is critical because untreated heart failure can progress rapidly. Diagnostic tests such as echocardiograms, B-type natriuretic peptide (BNP) blood tests, and chest X-rays are commonly used to evaluate heart function.
- Swelling that worsens with activity or at the end of the day
- Shortness of breath during exertion or while lying down
- Unexplained weight gain due to fluid retention
- Fatigue and weakness
If you notice persistent swelling accompanied by these symptoms, consult a cardiologist promptly. Treatment often involves medications like ACE inhibitors, beta-blockers, and diuretics to improve heart function and reduce fluid buildup.
2. Kidney problems
Kidney dysfunction is another serious cause of swollen feet. When kidneys fail to filter and eliminate excess fluid effectively, it accumulates in body tissues, leading to edema.
Chronic kidney disease (CKD) and acute kidney injury are common conditions that impair kidney function. In addition to swelling, symptoms may include changes in urine output, fatigue, nausea, and high blood pressure.
Tests such as blood urea nitrogen (BUN), serum creatinine levels, and urinalysis help assess kidney health. A glomerular filtration rate (GFR) test estimates how well kidneys filter waste.
- Swelling more pronounced in the legs, ankles, and sometimes around the eyes
- Foamy or bloody urine
- Persistent fatigue or confusion
- Elevated blood pressure readings
If kidney disease is suspected, early referral to a nephrologist is essential. Management may include dietary changes, medications to control blood pressure and fluid balance, and in advanced cases, dialysis.
