Albumin in urine (albuminuria) signals kidney damage and ranges from microalbuminuria (early, often reversible with blood pressure and diabetes control) to macroalbuminuria (more advanced). It raises risk of chronic kidney disease progression and cardiovascular disease. Even small amounts warrant repeat testing, evaluation for causes, and treatment—blood pressure and blood sugar control, ACE inhibitors/ARBs and lifestyle changes—to reduce progression and risk.

A normal urinary albumin level is less than 30 mg per 24 hours, or an albumin-to-creatinine ratio (ACR) under 30 mg/g (under 3 mg/mmol). Levels of 30–300 mg/day (ACR 30–300 mg/g) indicate microalbuminuria; above 300 mg/day indicates macroalbuminuria. Transient small increases can occur after exercise or infection; repeat testing confirms results.

Drinking water can temporarily lower measured serum albumin by diluting blood plasma (hemodilution), but it won’t correct chronically low albumin caused by malnutrition, liver or kidney disease, or inflammation—those need medical evaluation and treatment. For urine albumin (albuminuria), higher fluid intake may dilute urinary concentrations and increase urine volume, lowering concentration per milliliter without reducing total albumin loss.

Albumin in urine (albuminuria) can be reversible if detected early and treated. Controlling blood pressure (ACE inhibitors/ARBs), optimizing blood glucose, treating infections or stopping offending drugs, and lifestyle changes (weight loss, low-salt diet, smoking cessation) often reduce albuminuria. Persistent or worsening albuminuria suggests chronic kidney damage and may be less reversible, so regular monitoring and treating underlying causes are essential.

To reduce albumin in urine, address the underlying cause: control blood pressure (often with ACE inhibitors/ARBs), manage blood sugar if diabetic, follow a low-salt diet, lose excess weight, stop smoking, limit NSAIDs and excess protein, and manage cholesterol. Regular urine and kidney monitoring is essential; consult your clinician for medication, individualized treatment, or nephrology referral.

Early signs of kidney damage include changes in urination — more or less frequent, foamy urine, blood in urine, or difficulty urinating — swelling in ankles, feet, hands or around the eyes, persistent fatigue and weakness, loss of appetite, nausea or metallic taste, persistent itching, muscle cramps, and shortness of breath. High blood pressure can also signal early kidney problems.