Give the cause and one symptom of the following diseases
Hypertension

Explanation

### Step-by-Step Solution:

1. **Definition of Hypertension**:
- Hypertension, also known as high blood pressure, is defined as the continuous increase in arterial blood pressure above the normal range.

2. **Normal Blood Pressure Range**:
- The normal blood pressure range is typically around 120/80 mmHg, where 120 represents the systolic pressure (the pressure when the heart beats) and 80 represents the diastolic pressure (the pressure when the heart rests between beats).

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