Renal Artery Stenosis: One cause of high blood pressure is renal artery stenosis. Renal artery stenosis is caused by hardening of the arteries (atherosclerosis). Risk factors for renal artery stenosis are smoking, high blood pressure, high cholesterol, high blood lipids, and diabetes. Symptoms of renal artery stenosis include fatigue, malaise, or confusion. Treatment depends upon the cause of renal artery stenosis, and the degree of damage to the kidney(s).
Acute Kidney Failure Kidney failure, or the ability of the kidneys to filter water and waste, is caused by prerenal, postrenal, or renal problems with the kidney(s). Symptoms of kidney failure include decreased urine production, confusion, fatigue, lethargy, diarrhea, nausea, vomiting, abdominal pain, problems concentrating, edema, and a metallic taste in the mouth. Treatment for kidney failure depends upon the cause.