Hypertension can result in excess pressure on the brain, which can cause blood to leak from the blood vessels in the organ, said Medical News Today.
The site continued: “This causes edema, or swelling, which is problematic because the brain sits within the skull and has no space to expand.
“The swelling places further pressure on the brain and causes symptoms that include a headache, dizziness, nausea, confusion, weakness, seizures, and blurred vision.
“If a person receives treatment to lower their blood pressure, their symptoms will usually improve within an hour.”