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Health condition · Clinically reviewed

Long COVID, post-COVID symptoms lasting more than 12 weeks.

A heterogeneous condition with fatigue, breathlessness, brain fog, autonomic and cardiovascular symptoms. Multidisciplinary long-COVID clinics with pacing form the mainstay.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE NG188, WHO and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects UK multidisciplinary long-COVID clinic practice, pacing, and POTS-aware assessment.

Key facts

Long COVID at a glance.

The essentials, in plain English — what it is, how common it is, how it clusters, and what actually helps.

  • What it is

    Symptoms continuing for more than 12 weeks after COVID-19 that are not explained by another diagnosis.

  • How common

    Around 2 million people in the UK self-report ongoing symptoms after COVID.

  • Symptom clusters

    Fatigue-cognitive, respiratory, cardiovascular and autonomic — many people sit across more than one cluster.

  • Best care model

    Multidisciplinary long-COVID clinics outperform fragmented single-specialty care.

  • Central intervention

    Pacing — energy management — is the mainstay of rehabilitation for post-exertional symptoms.

  • Rule out mimics

    Thyroid disease, iron deficiency, sleep apnoea and POTS all mimic long COVID and are treatable.

Why this guide matters

Long COVID is real, and it responds to care.

Multidisciplinary assessment, treatable-mimic screening and pacing form the backbone of modern care. The three points below shape the rest of this page.

  • Rule out the mimics first

    Thyroid, iron, sleep apnoea and POTS all copy long-COVID symptoms and are treatable — never skip the workup.

  • Multidisciplinary beats fragmented

    One coordinated team outperforms bouncing between single specialists.

  • Pacing is the mainstay

    Energy management within your envelope stabilises symptoms and creates room to recover.

How the diagnosis is made

From first symptoms to a coordinated plan.

The steps a UK GP and long-COVID clinic will normally follow — so you know what to expect and why.

  1. 01

    Recognising

    Full symptom and timeline history

    Onset relative to acute COVID, current symptoms across systems, and how they fluctuate with activity.

  2. 02

    Recognising

    Rule out reversible causes

    Bloods (FBC, ferritin, thyroid, B12, HbA1c), ECG, chest X-ray and spirometry — many long-COVID mimics are treatable.

  3. 03

    Confirming

    POTS screen

    Active stand test with heart rate at baseline and after 10 minutes standing — a sustained rise of ≥30 bpm suggests POTS.

  4. 04

    Confirming

    Sleep-apnoea screen

    Snoring, witnessed apnoeas, daytime sleepiness — Epworth score and, if positive, home sleep study.

  5. 05

    Confirming

    Formal cognitive assessment

    If brain fog is prominent — screens like the MoCA or referral for neuropsychology where available.

  6. 06

    Managing

    Long-COVID clinic referral

    NHS long-COVID clinics coordinate respiratory, cardiology, neurology, OT and psychology in one pathway.

  7. 07

    Managing

    Structured pacing plan

    Energy management with activity, rest and boom-bust avoidance — the single most useful intervention for most people.

Typical timeline: 4–12 weeks from first tests to a settled multidisciplinary plan.

Symptoms

What long COVID actually feels like.

Symptoms cluster across systems and fluctuate — often day to day. Here is what to look for and when to act.

  • Fatigue and post-exertional malaise

    Disproportionate exhaustion after physical or mental effort, often delayed by 24–48 hours.

  • Breathlessness

    On exertion or with dysfunctional breathing patterns — improves with respiratory physiotherapy.

  • Cognitive fog

    Word-finding difficulty, poor concentration, short-term memory lapses — worse when tired.

  • Autonomic symptoms (POTS)

    Palpitations, dizziness and pre-syncope on standing — a well-recognised long-COVID feature.

  • Musculoskeletal pain

    Widespread aches, joint pain and muscle heaviness, often fluctuating day to day.

  • Sleep disruption

    Un-refreshing sleep, insomnia or reversed sleep pattern — worsens every other symptom.

  • Anxiety, low mood

    Common after a prolonged illness — needs recognition and support, not dismissal as “just anxiety”.

  • Red flag: chest pain, syncope, sudden breathlessness

    Any of these — call 999. New severe symptoms need urgent assessment, not pacing.

Treatment

How long COVID is treated in the UK.

Multidisciplinary care, pacing and targeted rehab — plus treatment of any treatable mimics uncovered along the way.

  • Long-COVID multidisciplinary clinic

    A coordinated pathway combining medical, rehab, OT and psychology input in one plan.

  • Pacing and energy management

    Structured activity within a personal envelope — avoids the boom-and-bust cycle that worsens post-exertional malaise.

  • Respiratory physiotherapy

    Breathing-pattern retraining for dysfunctional breathing — a common and very treatable driver of breathlessness.

  • Cardiac / autonomic work-up if POTS

    ECG, tilt-table or active stand, and POTS management — hydration, salt, compression and, where needed, medication.

  • Iron / B12 / thyroid correction

    Simple replacement therapy where deficiencies are found — can transform fatigue.

  • CBT tailored for chronic illness

    Not a cure, but helps with symptom coping, sleep and mood — delivered by therapists who understand post-viral illness.

  • Vestibular rehab if dizziness

    Balance retraining for post-viral vestibular symptoms — often overlooked and highly effective.

  • Vocational rehabilitation

    Return-to-work planning with graded hours and workplace adjustments — protects recovery and livelihood.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or long-COVID clinic knows your history and can tell you which parts apply to you. If in doubt, ask for a review.

  • NICE. COVID-19 rapid guideline: managing the long-term effects of COVID-19 (NG188).

  • World Health Organization. A clinical case definition of post-COVID-19 condition by a Delphi consensus.

  • Long COVID SOS. Patient information and advocacy resources.

  • Royal College of Occupational Therapists. How to conserve your energy — practical advice for people with long COVID.

Red flags

When long COVID needs urgent care.

Most long-COVID symptoms are managed in the community. These are the situations that need same-day medical review — or 999.

  • New chest pain or arrhythmia

    Especially with exertion — needs urgent cardiac assessment. Call 999 for severe or crushing pain.

  • Syncope

    A full blackout — needs same-day medical review to exclude cardiac and autonomic causes.

  • Sudden breathlessness

    Consider pulmonary embolism, especially if unilateral leg swelling. Call 999.

  • Neurological deterioration

    New weakness, speech change, visual loss or severe headache — treat as stroke until proven otherwise.

  • Severe dehydration in POTS

    Marked dizziness, dark urine, inability to keep fluids down — needs urgent review.

  • Uncontrolled mood or suicidality

    Persistent low mood or thoughts of self-harm — contact your GP, 111 or the Samaritans on 116 123 today.

  • Rapid weight loss

    Unexplained loss of more than 5% body weight — needs investigation for other causes.

  • New anaemia

    New tiredness with pallor or breathlessness — bloods and cause-finding needed.

  • Missed alternate diagnosis

    Symptoms that do not fit long COVID — insist on further investigation rather than labelling everything post-viral.

Living with it

A long recovery, but a real one.

Four things that make the biggest difference — pacing, sleep, credible support, and a plan that gets reviewed.

A quiet reminder

You are not making it up.

Long COVID is a recognised condition with dedicated NHS clinics and national guidance. If your symptoms persist beyond 12 weeks, ask for a referral.

  1. 01 Pacing

    Work inside your envelope

    Notice what you can do without triggering a crash the next day — then plan to that level, not what you wish you could do.

  2. 02 Sleep

    Protect the sleep routine

    Consistent wake time, low-stimulation evenings, and daylight in the morning — sleep is the foundation of everything else.

  3. 03 Support

    You are not making it up

    Long COVID is a recognised condition with NICE guidance. Ask for referral to a long-COVID clinic if your symptoms persist beyond 12 weeks.

  4. 04 Reviews

    Review the plan every few months

    Symptoms shift over time — treatment should too. Regular reviews with your GP or clinic keep the plan honest.

Frequently asked

Everything we get asked about long COVID.

Quick answers on diagnosis, pacing, POTS, exercise, recovery and when to seek a referral.

  • How is long COVID diagnosed?

    By symptoms lasting more than 12 weeks after COVID-19 that are not explained by another diagnosis — after ruling out treatable mimics like thyroid disease, iron deficiency, sleep apnoea and POTS.

  • What is pacing?

    Pacing is planned energy management — matching activity to what your body can currently tolerate without triggering a crash. Done well, it stabilises symptoms and gradually widens what you can do.

  • What is POTS and why does it matter?

    Postural Orthostatic Tachycardia Syndrome — a sustained rise of at least 30 bpm on standing with symptoms. It is common after COVID and responds well to hydration, salt, compression and, where needed, medication.

  • Will long COVID get better?

    Many people improve substantially over months to a couple of years, especially with pacing and multidisciplinary support. A minority have longer-term symptoms and need ongoing care.

  • Can I exercise?

    Cautiously. Graded activity within your envelope is fine, but pushing through post-exertional malaise typically makes things worse. A rehab physiotherapist familiar with long COVID is invaluable.

  • When should I ask for a long-COVID clinic referral?

    If symptoms persist beyond 12 weeks and are affecting daily life, ask your GP about referral to your local NHS long-COVID service.

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