A head-rush a few times a month, after standing quickly, that settles in seconds is normal. The thresholds for medical attention are: dizziness on most occasions of standing, any fainting, symptoms that started with a new medication, or dizziness accompanied by chest pain, palpitations, or bleeding. Orthostatic hypotension affects 20–30% of people over 65, and because it is a leading cause of falls, it is worth taking seriously in older adults even when episodes are brief.
🚨 Make an Appointment If:
You have fainted, even briefly, or come close to fainting more than once
Dizziness happens most times you stand up
It started or worsened after a new medication or dose change
You have diabetes, heart disease, or Parkinson's disease
Episodes come with chest pain, palpitations, or shortness of breath
You notice black stools, or heavy periods (possible blood loss)
You are over 65 and have had a fall or near-fall
Why It's Worth Checking
Most causes of orthostatic hypotension are easily identified — a blood-pressure measurement lying and standing takes three minutes, and blood tests cover anaemia, diabetes, and kidney function. Medication-related cases are often fixed with a simple adjustment. The serious outcomes — falls, fractures, and the rare cardiac cause — are worth preventing, and the work-up is quick enough that there is little reason to wait.
What to Expect
Lying-to-standing blood pressure: the diagnostic test; a systolic drop of 20 mmHg or more within 3 minutes of standing confirms orthostatic hypotension.
Medication review: bring a list of everything you take, including supplements.
Blood tests: full blood count, glucose, electrolytes, and kidney function.
ECG: routine in anyone who has fainted, to check the heart rhythm.
Which Specialist to See
Start with your GP. Depending on findings, you may be referred to a cardiologist (faints, palpitations), a neurologist (autonomic issues, Parkinson's), or an endocrinologist (diabetes-related). A pharmacist can also review medication timing — sometimes taking blood-pressure tablets at night instead of the morning resolves the problem entirely.
Urgency Guide
Emergency: fainting with chest pain, severe breathlessness, an irregular racing heartbeat, or fainting after a head injury.
Within a week or two: repeated fainting, dizziness most times you stand, black stools, or new medication timing.
Routine: occasional head-rushes you want explained.
While you wait, the relief page has the safest ways to reduce episodes.
Questions the Doctor May Ask
Do you feel light-headed, spinning, or off-balance — and does it happen only on standing?
Have you ever fainted, and did anyone see the episode?
What medications are you taking, including over-the-counter products?
Have you been drinking enough, or has there been heat, exercise, or alcohol?
Do you have diabetes, heart disease, or a history of anaemia?
Have you noticed black stools or heavy periods?
What Happens If You Wait — and What You Can Do Now
Waiting a few weeks with occasional head-rushes is fine. Waiting with repeated fainting, or with dizziness on most stands, is how falls happen. While you wait for an appointment: stand up in stages, tense your legs before rising, drink consistently, and keep a diary of episodes (time, duration, preceding activity, near-faints). If you faint with chest pain, palpitations, or breathlessness, or faint after a head injury, that is an emergency — do not wait for the appointment.
How to Prepare for the Appointment
Bring a list of every medication with doses — including over-the-counter products — because medication is the most common reversible cause and the review is the fastest part of the work-up. Note how often you have felt dizzy, whether you have ever fainted, and whether episodes follow particular situations (mornings, meals, heat, exercise). Mention any black stools, heavy periods, or recent illness with vomiting or diarrhoea. If you have diabetes, bring your recent blood sugar readings. This information turns the appointment into a confirmation exercise rather than an investigation from scratch.
What the Tests Will Show
The lying-to-standing blood pressure measurement is the core test: a systolic drop of 20 mmHg or more within three minutes of standing confirms orthostatic hypotension, and the pattern of the drop (fast and steep, or slow and gradual) hints at the mechanism. Blood tests then separate the causes: a low haemoglobin points to anaemia, a high HbA1c to diabetes, and abnormal kidney function to a fluid-balance problem. An ECG checks the heart rhythm, and if faints have occurred, a period of heart monitoring may be arranged to catch intermittent rhythm problems. In the large majority of cases the picture is complete after these steps, and the treatment is straightforward.
Treatment Options at a Glance
Fluid and salt (with medical advice): increases blood volume and reduces the standing drop.
Medication review: timing or dose changes for diuretics and blood-pressure drugs often resolve symptoms entirely.
Compression stockings: waist-high stockings reduce blood pooling in the legs.
Physical counterpressure: leg tensing and staged standing — the same techniques as on the relief page.
Rarely, medication: for autonomic causes that do not respond to the above.
⚠️ Medical Disclaimer: This site is for informational purposes only and does not constitute medical advice. Always consult a healthcare professional for medical concerns.