1. Borderline Hypertension: Blood pressure readings between 130-139/85-89 mmHg do not require medication. Lifestyle changes can effectively control blood pressure. 

2. Medication-induced Hypertension: Some cold medicines can cause a temporary increase in blood pressure, particularly in middle-aged and elderly individuals. In such cases, medication is not necessary. 

3. Pseudohypertension: Factors like incorrect posture, fasting before measurement, and using a tight cuff can lead to higher blood pressure. Medication is not needed in these cases. 

4. Exercise-induced Hypertension: After aerobic or anaerobic exercise, temporary blood pressure elevation may occur. Resting and allowing blood pressure to return to normal is sufficient for most cases.