High blood pressure (hypertension) has 2 types. Every type has its own causes.
1. Primary hypertension causes :
-Genes inherited from your parents.
-Physical changes as change in kidney function.
- Environment with unhealthy life style.
2. Secondary hypertension causes :
-Adrenal gland problems
-Kidney disease.
-Obstructive sleep apnea.
-Congenital heart defects.
-Thyroid problems.
-Alcohol abuse.
-Some endocrine tumors.