We say "have high blood pressure" or "have hypertension". When you talk about diseases, the article a/an is generally unnecessary after the verb.
We say "have high blood pressure" or "have hypertension" (without the article "a").
The patient has hypertension and diabetes.
The patient has a hypertension and diabetes.
When you talk about diseases, the article a/an is generally unnecessary after the verb.
People who have high blood pressure do not typically have symptoms.
Having high blood pressure before pregnancy can cause gestational hypertension.
Follow the same convention with the expressions "diagnose hypertension", "treat hypertension", "cause high blood pressure", "prevent high blood pressure", etc.
What causes high blood pressure?
Healthy eating and exercise can help prevent and treat hypertension.
However, you can use a possessive pronoun (my, your, his, her, our, your, their) before "hypertension" or "high blood pressure".
Your doctor may prescribe medication to control your hypertension.
A partial list of conditions that do not take the indefinite article a/an can be found below: