Causes
Primary (or essential) hypertension is when the cause is unknown. The majority of hypertension cases are primary. When there is an underlying problem such as kidney disease or hormonal derangements that can cause hypertension, it is called secondary hypertension. When it is possible to correct the underlying cause, high blood pressure usually improves and may even return to normal.
Other factors that can contribute to hypertension include:
- age (blood pressure usually increases with age)
- diet
- excessive alcohol consumption
- lack of exercise
- obesity
- sleep apnea
- stress