Renal ultrasound is performed to evaluate kidney disease and blockage of the urinary system. Aortorenal angiography also helps in the diagnosis of many renal vascular diseases. Renal biopsy is useful for identifying intrarenal causes of AKI. Chronic kidney disease: In most cases kidney function starts to worsen over a number of years, which is actually a good thing as it can help with early diagnosis and further medication. Additionally, changes in diet and lifestyle can improve kidney function. Chronic kidney disease (CKD) or chronic kidney disease (CRD) occurs due to progressive and gradual loss of kidney function. Symptoms are nonspecific and could include loss of appetite and general illness. The most common causes of chronic kidney disease are • diabetes mellitus • hypertension or high blood pressure • Glomerulonephritis is a group of diseases that cause inflammation and damage to the kidneys. • Hereditary diseases such as polycystic kidney disease. • Malformations during pregnancy. • Lupus and other similar diseases that affect the body's immune system. • Kidney stones or an enlarged prostate in men. • Recurrent urinary infections. Symptoms of kidney failure include: • Vomiting • Weight