High Blood Pressure (as a Sign)
High blood pressure can be detected during a routine visit or at home. A single elevated reading is not the same as a diagnosis of hypertension. Knowing what to do with high readings can prevent both undertreatment and overtreatment.
Table of Contents
Quick Facts
- Normal: <120/80 mmHg
- Elevated: 120–129/<80
- Stage 1: 130–139/80–89
- Stage 2: ≥140/90
When to Call 911
Hypertensive emergency — blood pressure typically >180/120 with new symptoms — needs immediate care. Call 911 for:
- Severe headache
- Chest pain or shortness of breath
- Weakness, vision changes, or trouble speaking
- Severe nosebleed that won't stop
- Confusion or seizure
What to Do with a High Reading
- Rest 5 minutes and recheck
- Check at home over multiple days, morning and evening
- Bring the log to your provider
- Avoid caffeine, exercise, and smoking before measuring
- Use a validated upper-arm cuff with proper size
Why It Might Be High
- 'White coat' effect — anxiety at the office
- Recent caffeine, exercise, or stress
- Pain or full bladder
- Improper cuff size or technique
- Untreated or undertreated hypertension
- Secondary causes (kidney disease, thyroid, sleep apnea, certain medications)
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.
References
- American Heart Association. Blood Pressure Resources.