Orthostatic & Autonomic Symptoms

The common thread in these symptoms is a link to being vertical — standing, or sitting upright for a sustained period. What people describe includes:

• Feeling worse when standing or sitting upright, sometimes improving when lying down
• Light-headedness that builds the longer the person stays up
• A heart that races or pounds noticeably, particularly after standing
• Shakiness or trembling
• Weakness — a drained, unreliable feeling in the legs
• Nausea arriving alongside the other sensations
• Feeling faint, or close to fainting
• Temperature regulation difficulties — feeling too hot, too cold, or swinging between them
• Sweating that changes without an obvious reason — more, less, or at odd moments
• Symptoms becoming more noticeable after a stretch of standing rather than immediately
• Needing to sit or lie down sooner than expected — plans made upright, interrupted

Not everyone with ME/CFS experiences these symptoms, and among those who do, the pattern differs. For some they are present most days; for others they appear mainly during flares, in warm weather, or after particular activities such as showering.

Because so much of daily life involves being vertical, these symptoms tend to surface in everyday places rather than dramatic ones:

• Standing in the kitchen — cooking, washing up, or waiting for the kettle
• Showering — warm water plus standing plus arms raised, sometimes followed by needing to lie down afterwards
• Waiting in line — a queue can be harder than slow walking for some people
• Sitting upright through an appointment — chairs, bright rooms, and no option to lie back
• Travelling — sitting upright in a car, or standing on public transport with nothing to lean on
• Standing to talk — a doorstep conversation becoming more demanding than its content
• Getting dressed — a surprising amount of which is done standing

Many people become quietly skilled at reorganising these moments once the pattern is recognised — a stool in the kitchen, a chair at appointments, tasks moved to a lower surface. These are reasonable responses to a real pattern, not fussiness.

A few things are worth knowing about how these symptoms behave, because the variability itself is often the confusing part:

• These symptoms can overlap with other conditions — ME/CFS is not the only possible explanation, which is one reason this page avoids naming or excluding specific diagnoses
• Someone may tolerate one upright activity — a slow wander around a shop — and struggle with another — ten minutes at the kitchen counter — on the same day
• Tolerance can vary day to day without anything having obviously changed
• For some people the symptoms are noticeable only during flares or worse periods; for others they are a daily feature

This inconsistency is part of how the experience works, not evidence that it is being imagined. A person who managed the shower on Tuesday and cannot on Friday is describing the same symptom on two different days.

For people who experience these symptoms, being upright is not neutral — it is an activity in its own right, with a running cost like any other. Many people describe an unspoken arithmetic around the day: how much of it will be spent vertical, and where the lying-down time fits either side. A shower before an appointment, standing at the bus stop, sitting upright through the appointment itself, then the walk home — for some people, that sequence is a full day's upright budget, whatever the calendar says.

Recognising this changes how ordinary plans read. Resting before an upright activity, not only after it, is a sensible arrangement rather than laziness, and counting upright time as real activity is a more accurate way to plan than assuming only 'exercise' counts.

These are general adjustments, not medical measures — decisions about specific treatments belong with a clinician who knows the person's situation, and nothing here prescribes salt, fluids, compression garments, medication or any form of exercise:

• Sitting for tasks where appropriate — cooking at a stool, sitting to dress or dry hair, seated showers where practical
• Keeping a chair or stool where standing tends to happen — kitchen, bathroom, hallway
• Planning for seated waiting — booking the first appointment, asking at reception, choosing the café with chairs over the one with stools
• Reducing unnecessary standing — sitting while a kettle boils is not an extravagance
• Lying down when the person already knows that helps, without treating it as a last resort
• Asking for seating or access adjustments in advance — venues, clinics and workplaces often have options that nobody mentions until asked

For some people, a mobility aid with a seat for longer outings preserves more of the day for the parts that matter. That is a practical trade-off to weigh, not a defeat.

Upright and autonomic-type experiences occur across the spectrum, though their reach differs:

• Mild — symptoms may appear mainly around longer upright activities — big shops, events, long queues — with lying down usually recovering the day
• Moderate — the budget is smaller: showers and cooking may need seating, rest before and after, and a typical morning can use much of the upright allowance
• Severe — upright tolerance may be very limited, with washing, toileting and meals each needing careful positioning, help or equipment, and lying down often the default rather than the exception
• Very severe — being propped upright at all, even briefly, may be difficult for some people; care may need to be arranged around lying flat, with communication, feeding and personal care adapted to that

At every level, the underlying point is the same: how far a person can be upright is a fact about their day, not a measure of their effort or willingness.

The most useful support is often invisible: offering a seat before being asked, taking the place in the queue, choosing the venue with seating, parking closer. Offering matters, because having to ask repeatedly is itself a demand. And when someone says they need to sit or lie down, speed helps more than discussion — the moment usually passes faster than a conversation about it would.