Severe shortness of breath
* A racing or very irregular heartbeat
* New weakness
* Sudden confusion
* Vision changes
If symptoms suggest a heart attack, stroke, or another medical emergency, call emergency services.
High blood pressure itself usually causes no symptoms, but very high blood pressure accompanied by chest pain, breathing difficulty, weakness, numbness, vision changes, or trouble speaking requires emergency attention.
## Who Should Be Extra Careful?
Extra precautions may be sensible for people who:
* Have previously fainted
* Frequently experience dizziness
* Have orthostatic hypotension
* Have heart disease
* Have poorly controlled blood pressure
* Take
