SYMPTOM
You feel lightheaded or unsteady, like you might faint, particularly when standing still for a while, such as in a queue. This often happens because your blood pressure dips when you stand up, making it harder for blood to reach your brain, especially if you're dehydrated or haven't moved much.
For general awareness only. This is not medical advice. If symptoms are severe or persistent, consult a healthcare professional.
Showing 9 causes
Vasovagal syncope trigger
Standing for too long, especially when stressed or warm, could make your nervous system overreact. This causes a sudden drop in heart rate and blood pressure, which leads to lightheadedness.
Orthostatic hypotension
When you stand up, your blood pressure drops because your body doesn't adjust quickly enough. This means less blood gets to your brain, making you feel lightheaded.
Medication side effects
Some medicines could affect how your body controls blood pressure when you change positions. This could lead to dizziness when standing up for a while.
Dehydration
Not drinking enough fluids makes your blood volume lower, which could cause your blood pressure to drop when you stand. This reduces blood flow to your brain.
Heat exhaustion
Being in a warm, crowded line could overheat your body. This impairs your body's ability to regulate blood flow and temperature, which leads to dizziness.
Anemia
With fewer red blood cells, your blood carries less oxygen. This reduced oxygen supply to the brain could cause dizziness, especially when your body is working harder to stay upright.
Low blood sugar
If you haven't eaten, your blood sugar could dip, reducing the brain's energy supply. This could make you feel faint, especially after being still for a while.
Autonomic neuropathy
Nerve damage affects your body's automatic responses, like regulating blood pressure. This makes it hard for your body to adjust when standing, which leads to dizziness.
Heart rhythm abnormality
An irregular heartbeat may not pump enough blood to your brain. This could cause sudden dizziness or lightheadedness when you stand up for a prolonged period.