Is it normal to feel dizzy when standing up?

Occasional, brief lightheadedness when standing up quickly is common and usually harmless. It is typically caused by orthostatic hypotension (also called postural hypotension), which is a temporary drop in blood pressure when you change positions.

When you stand up, gravity pulls blood toward your legs and abdomen. Normally, your nervous system quickly compensates by narrowing your blood vessels and increasing your heart rate to maintain blood flow to your brain. If this mechanism lags slightly, you may feel dizzy for a few seconds.

When is it harmless?

An occasional mild spell is usually nothing to worry about, especially if it occurs when you are:

• Dehydrated: Low fluid volume reduces overall blood pressure.
• Getting up too fast: Moving suddenly from a deep sleep or lying down.
• In a hot environment: Heat dilates blood vessels, lowering blood pressure.
• Taking certain medications: Especially blood pressure drugs, diuretics, or antidepressants.

How to manage it

• Move slowly: Pause on the edge of your bed or chair for a few moments before standing up completely.
• Stay hydrated: Drink plenty of fluids throughout the day.
• Tense your muscles: Clenching your thighs or crossing your legs before standing can help pump blood back up toward your heart.

When to see a doctor

While occasional mild dizziness is common, frequent, worsening, or severe dizziness is not normal. You should schedule an appointment with a doctor to rule out underlying issues like heart conditions, endocrine problems, or neurological disorders.

Seek immediate medical care if the dizziness is accompanied by:

• Fainting (loss of consciousness)
• Chest pain or palpitations
• Shortness of breath
• Sudden weakness, numbness, or difficulty speaking
• Blurred or double vision