The persistent hypertension is among the risk factors for strokes, heat failure, heart attacks and arterial aneurysm and is leading cause of the chronic renal failure. Even the moderate elevations of arterial blood pressure leads to a shortened life expectancy. Recent classification recommends the blood pressure criteria for normal blood pressure defining, hypertension, isolated systolic hypertension and prehypertension that is common occurrence among elderly.

Older than 50 years of individuals, hypertension is considered when blood pressure of person is consistently at 140 mmHg at systolic and 90 mmHg at diastolic. Resistance is hypertension is defined as failure to reduce the pressure to appropriate level after taking three-drug regimen.

One of common symptoms and signs of hypertension are headaches, most frequent headache, symptom is very nonspecific. An accelerated hypertension is also associated with confusion, nausea, visual disturbance, and confusion and vomiting. Retinas are also affected with the narrowing of arterial diameter; it is less than 50% of venous diameter, silver wired appearance, hemorrhages, exudates or papilledema.

Some symptoms and signs are important especially in the neonates and infants such as seizure, thrive, lethargy or irritability and the respiratory distress. While hypertension in children may cause fatigue, headache, epistaxis, blurred vision and bell palsy. Probably, hypertensive encephalopathy is caused by capillary congestion with cerebral edema that is reversible. Sleep disturbance is also considered a big factor of hypertension in normal person.