1. Persistent lower back pain
Lower back pain is a common symptom that many people experience at some point, often attributed to muscle strain or poor posture. However, when pain is persistent and localized near the kidneys, it could indicate an underlying kidney problem such as a kidney infection, kidney stones, or other renal conditions.
Kidney-related pain is typically felt deep in the back, just below the rib cage and above the waistline, and it may radiate toward the abdomen or groin. Unlike typical muscular pain, this discomfort is often sharp or severe and does not improve significantly with rest or changes in position.
If you notice persistent pain in this area accompanied by other symptoms like fever, chills, or changes in urination, it is important to get evaluated promptly. Imaging tests such as an ultrasound or CT scan can help detect kidney stones or infections, while blood and urine tests assess kidney function.
2. Swelling and fluid retention
Swelling, also known as edema, is a frequent sign of kidney problems because damaged kidneys cannot effectively remove excess fluid and salt from the body. This leads to fluid accumulation in tissues, most commonly in the legs, ankles, feet, or around the eyes.
Fluid retention related to kidney issues may be noticed as puffiness or tightness in the skin, weight gain over a short period, or noticeable swelling after periods of inactivity. This symptom is especially important because it can signal worsening kidney function and increased risk for complications like high blood pressure and heart strain.
In clinical practice, doctors often monitor swelling alongside laboratory markers such as serum creatinine and albumin levels to evaluate kidney health. Managing edema may require dietary changes, diuretics, or treating the underlying kidney condition.
