Acute and chronic kidney disease explained

Either problem can disturb fluid, salts and waste removal. Blood and urine tests are needed because symptoms alone cannot show how well the kidneys are filtering.

Acute kidney injury may follow dehydration, severe infection, urinary blockage, reduced blood flow or a medicine effect. It can develop over hours or days and may improve when the cause is treated promptly.

Chronic kidney disease develops over months or longer. Diabetes and high blood pressure are frequent contributors. Early disease can cause no noticeable symptoms; later presentations can include fatigue, itching, nausea, swelling, breathlessness or changes in urination. Anaemia and mineral imbalance may occur as kidney function declines.

Arrange clinical assessment for suspected kidney problems rather than changing fluid intake on your own. A clinician may check creatinine, electrolytes, urine protein, blood pressure, medicines and possible urinary obstruction. Previous results help distinguish a sudden change from a longstanding pattern.

Keep diabetes and blood pressure care on schedule, follow individual dietary advice and avoid unreviewed herbal products. Before taking non-prescription painkillers, ask a pharmacist or clinician whether they are suitable for your kidney function. During vomiting, diarrhoea or fever, request advice about hydration and whether any regular medicines need temporary adjustment.

Seek urgent care for very little or no urine, new confusion, severe drowsiness, persistent vomiting, rapidly increasing swelling, or breathlessness. Severe weakness, fainting or an irregular heartbeat can signal a dangerous salt or fluid disturbance.

Prompt review is also warranted after substantial fluid loss, a serious infection, difficulty passing urine, or starting a medicine followed by reduced urine or swelling. Emergency care is appropriate when breathing is difficult or consciousness changes.

Ask whether the change appears acute or chronic, what the likely cause is, which medicines require review, how often blood and urine tests are needed, and what fluid or dietary guidance applies to you.