55 • Renal artery stenosis (narrowing of the blood vessels to one or both kidneys). • Liver disease. • Heart trouble. • Raised aldosterone levels (water and salt retention in the body along with imbalance of various blood minerals). • Low blood pressure (hypotension), likely to occur if you are dehydrated (excessive loss of body water) or have salt deficiency due to diuretic therapy ('water tablets'), low-salt diet, diarrhoea, or vomiting. • Elevated potassium levels in your blood. • Diabetes.