High blood pressure often causes no symptoms. Diagnosis is based on standardised repeated measurements and, when appropriate, home or ambulatory monitoring rather than how a person feels.
Why the Symptom Pattern Matters
- Office and home readings may differ because of white-coat or masked hypertension.
- Incorrect cuff size, talking, pain or no rest can raise readings.
- Morning-evening trends and night-time pressure add information.
- Very high pressure with acute organ symptoms is different from an isolated high reading.
Possible Causes
This list explains possibilities; the symptom alone cannot establish a diagnosis.
- Primary hypertension
- Kidney or endocrine disease
- Sleep apnoea
- Medicines, alcohol, stimulants and high sodium exposure
- Pregnancy-related hypertension
What the Clinician Will Assess
- Validated device and correct technique
- Overall cardiovascular and kidney risk
- Medicine adherence and interacting products
- Secondary-cause clues
Which Tests May Be Considered?
Not every test is required for every person. Selection depends on examination findings and clinical probability.
- Home or 24-hour monitoring
- Kidney function, electrolytes, glucose and lipids
- Urine testing and ECG
- Targeted secondary-cause tests
What to Record Before the Appointment
- Two readings one minute apart under standard conditions
- Date, time and medicine timing
- Symptoms and unusual circumstances
- Weekly or clinician-directed averages
When to Call Emergency Services
Do not wait for an online reply
- Blood pressure above 180/120 mmHg with chest pain or breathlessness
- New weakness, speech or visual change
- Confusion, seizure or severe unusual headache
- Pregnancy with severe headache, visual change or upper abdominal pain
Frequently Asked Questions
Can I feel whether my pressure is high?
Usually not reliably; measurement is required.
Should I take an extra tablet for one high value?
Not unless you have a specific written plan.
Are wrist monitors suitable?
Upper-arm validated monitors are generally preferred; special circumstances require individual advice.
Medical information note
This page provides general information and does not replace examination, diagnosis or an individual treatment plan.