Renal artery stenosis disease is a condition caused due to hardening of renal arteries(atherosclerosis). ‘Plaque’ builds up in the artery walls because of cholesterol, diabetes and hypertension. Restrict the blood flow in the renal arteries. The kidneys will not function properly causing your blood pressure to rise which will further lead to kidney failure. The disease develops slowly. The first sign of renal artery stenosis if you have high blood pressure is worsening of the high blood pressure and uncontrolled hypertension even with use of antihypertensive medications.Early detection of the disease is important before it leads to complications like renal failure and severe hypertension. Blood tests and kidney function tests are done to evaluate the kidney functions. Duplex ultrasound scan, CT scan, and angiography are done to detect the exact location of the blockage.