--- title: "Long COVID: Symptoms, Causes & NHS Treatment | HealthAnswers" description: "Long COVID means symptoms lasting weeks after COVID-19 — fatigue, brain fog and breathlessness are common. How the NHS assesses it and when to see a GP." url: https://healthanswers.co.uk/conditions/long-covid/ robots: noindex --- # Long COVID: Symptoms, Causes & NHS Treatment | HealthAnswers Health A–Z Long COVID means symptoms lasting weeks after COVID-19 — fatigue, brain fog and breathlessness are common. How the NHS assesses it and when to see a GP. Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026 ## Quick answer What is long COVID? Long COVID means symptoms that continue for more than 4 weeks after a COVID-19 infection, or new symptoms that develop after recovery. Common problems include extreme tiredness, breathlessness, brain fog and muscle aches. See a GP if symptoms are not improving — assessment and support are available on the NHS. General UK health information, not a diagnosis. In an emergency call 999 ; for urgent advice use [NHS 111](https://111.nhs.uk/) (GP out-of-hours in Northern Ireland). On this page 7 sections ## Key facts about long COVID - Long COVID affects a minority of people after COVID-19 — estimates vary. - Symptoms lasting more than 4 weeks may be long COVID; after 12 weeks it is often called post-COVID syndrome. - Fatigue, breathlessness and brain fog are among the most reported symptoms. - Symptoms can fluctuate — good days and bad days are common. - GP assessment can rule out other causes and arrange referrals or rehabilitation. ## What is long COVID? Long COVID describes symptoms that continue for more than four weeks after a [COVID-19](https://healthanswers.co.uk/conditions/covid-19/) infection, or new symptoms that appear after the initial illness has passed. It can affect people who had mild or severe COVID-19, and even those who had no obvious symptoms at the time of infection. You may also hear the term **post-COVID syndrome** for symptoms lasting more than 12 weeks. ## Common symptoms Long COVID affects different people in different ways. Frequently reported symptoms include: - Extreme tiredness — not relieved by rest; often the most disabling symptom - Breathlessness — on exertion or at rest - Brain fog — difficulty concentrating, remembering or finding words - Muscle and joint aches - Sleep problems - [Low mood](https://healthanswers.co.uk/symptoms/low-mood-symptom/), anxiety or low motivation - Chest tightness or [palpitations](https://healthanswers.co.uk/symptoms/palpitations/) - [Loss of smell](https://healthanswers.co.uk/symptoms/loss-of-smell/) or taste — can persist for months Symptoms often **come and go** — you may have good days followed by setbacks after activity. This pattern is common and does not mean you are failing to recover. ## When to see a GP See a GP if symptoms persist beyond four weeks after COVID-19. They can: - listen to your experience and validate your symptoms - arrange blood tests or other checks to rule out alternative causes - refer you to long COVID clinics or rehabilitation services where available - advise on pacing, return to work, and managing specific symptoms Long COVID is recognised by the NHS — you do not need to prove how ill your initial infection was. ## Managing symptoms There is no single cure, but many symptoms improve with time and support: - Pacing — balance activity and rest; avoid “boom and bust” cycles of overdoing it then crashing - Gradual increase in activity — guided by physiotherapy if breathlessness or fatigue is significant - Sleep hygiene — regular routines, limiting screens before bed - Mental health support — low mood and [anxiety](https://healthanswers.co.uk/conditions/anxiety/) are common and treatable - Your COVID Recovery — NHS online resources with advice and exercises ## Returning to work and daily life Recovery is often slow and unpredictable. Many people need a phased return to work. Occupational health and your GP can help plan this. Be honest with employers about what you can manage. ## What we still do not know Research into long COVID continues. Causes are not fully understood — possibilities include persistent virus fragments, immune system changes, or effects on blood vessels and nerves. This uncertainty does not make your symptoms less real. ## Getting support If symptoms are affecting your quality of life, ask your GP about local long COVID services. Peer support groups — online or in person — can also help, though medical advice should come from qualified professionals. ## ! When to see a GP about long COVID See a GP if you still have symptoms 4 weeks after COVID-19, if symptoms are worsening, or if new symptoms appear such as chest pain, palpitations or significant breathlessness. Call **999** for sudden severe chest pain, difficulty breathing at rest, or signs of stroke. Long COVID is a real condition — you do not need to manage it alone. ## Common questions about long COVID How long does long COVID last? There is no fixed timeline. Some people improve within a few months; others have symptoms for a year or more. Gradual improvement is common, but recovery is often slow and non-linear. What are the most common long COVID symptoms? Extreme tiredness (fatigue), breathlessness, problems with memory and concentration ("brain fog"), muscle and joint aches, sleep disturbance, anxiety and low mood, and chest tightness. Symptoms vary widely between people. How is long COVID diagnosed? There is no single test. A GP will listen to your symptoms, check when they started in relation to COVID-19, and may arrange tests to rule out other conditions — for example anaemia, thyroid problems or heart issues. What treatment is available for long COVID? Support is tailored to your symptoms and may include fatigue management, physiotherapy, breathing exercises, occupational therapy, and mental health support. Pacing activity — balancing rest and movement — is often important. Can vaccination prevent long COVID? Vaccination reduces the risk of severe initial COVID-19 illness, which may lower the chance of long COVID, though some vaccinated people still develop it. Research continues in this area. ## Sources - [NHS — Long COVID](https://www.nhs.uk/conditions/long-covid/) - [NICE — COVID-19 rapid guideline (long COVID)](https://www.nice.org.uk/guidance/ng188) ## How we reviewed this page Medically reviewed by the [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) First published 14 June 2026 Medically reviewed 3 July 2026 Next review due 3 July 2029 or sooner if NHS or NICE guidance changes Written by HealthAnswers editorial team. Published by HealthAnswers (Elite Digital AI Solutions Ltd). 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