What Is Orthostatic Intolerance?

Orthostatic intolerance is a term used when symptoms appear or worsen while sitting upright or standing and improve when you lie down. It describes a symptom pattern, not a diagnosis by itself.

People often use this term when talking about dizziness, lightheadedness, weakness, brain fog, palpitations, or feeling unwell when upright for too long.

What symptoms can be part of orthostatic intolerance?

Symptoms may include:

• dizziness
• lightheadedness
• feeling faint
• palpitations
• weakness
• fatigue
• brain fog
• nausea

Not everyone has the same pattern, and one person’s bad day may look different from another’s.

Is orthostatic intolerance the same as POTS?

No. POTS is one condition that involves orthostatic symptoms, but orthostatic intolerance is a broader term. It describes the upright symptom pattern itself rather than naming the exact condition behind it.

Why the term matters

For patients, this term can be helpful because it gives a name to a pattern:

• worse upright
• better lying down
• symptoms tied to position or sustained standing

That can also make tracking more useful, because you can organize symptom history around what changes with position instead of treating every symptom as random.

What tracking can help with

Tracking does not diagnose orthostatic intolerance, but it can help you organize:

• when upright symptoms happen
• what the symptoms feel like
• what changed recently
• what measurements or context were relevant

That can make care conversations easier to prepare for.

Where Zebra fits

Zebra helps keep symptom history and position-related observations in the same record, which is especially useful when upright symptoms are part of the bigger picture you are trying to explain.

Key takeaways

• Orthostatic intolerance means symptoms worsen upright and improve lying down.
• It is a symptom pattern, not a diagnosis by itself.
• Tracking the position-related pattern can make the history easier to review later.

FAQ

What does orthostatic intolerance mean?

It means symptoms show up or worsen when you are upright and improve when you lie down.

Is orthostatic intolerance the same as POTS?

No. POTS is one diagnosis that can involve orthostatic symptoms, but orthostatic intolerance is a broader pattern.

Can tracking diagnose orthostatic intolerance?

No. Tracking can help organize the history, but diagnosis still depends on clinical evaluation.

Put this into practice

Download Zebra

Use Zebra to keep upright symptoms and related history in one record.

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Knowledge hub

Orthostatic Intolerance POTS Dizziness Orthostatic Test Dysautonomia