The elevation or arterial blood pressure above the normal value is called hypertension . hypertension means high blood pressure. The normal blood pressure in our body is 140/90.in hypertension the systolic pressure is above 140 mm hg and diastolic pressure above 90 mm hg. The hypertension causes head ache, visual disturbance , tiredness , giddiness etc. hypertension is caused by obesity , stress, arteriosclerosis, smoking etc.

Hypotension

The decrease in arterial blood pressure in known as hypotension. In hypotension situation the systolic pressure is dropped to 100 mg hg and the diastolic pressure is dropped to 60 mm hg. Hypotension may cause dilation of arteries, blood loss, weakness of heart muscles etc. the main symptom is tiredness , fainting and dizziness etc.

Arteriosclerosis

It is disease characterized by the hardening of the arteries due to the accumulation of calcium salts precipitate .the calcification make the artery stiff , hard . the elastic property of artery losses, the affected blood vessel ruptured very easily. Arteriosclerosis is severe in old ages it may lead to heart attack and even cause death.