High blood pressure can be caused by another disease, or by environmental, behavioural and genetic causes.
Primary causes of high blood pressure include:
- Drinking alcohol
- Lack of exercise
- Poor diet
- Genetic susceptibility to high blood pressure
Primary hypertension, accounts for 90-95% of adult cases of high blood pressure.
High blood pressure can also be caused by the following conditions:
- Kidney damage
- Blood vessel damage
- Hormonal problems, such as adrenal or thyroid issues.
When hypertension is caused by other diseases, it is known as secondary hypertension. Secondary hypertension is much less common than primary hypertension. Secondary hypertension accounts for just 2-10% of high blood pressure cases in adults.