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Chronic Fatigue Syndrome

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Chronic Fatigue Syndrome

A serious long-term neurological condition. The old advice to exercise your way out of it was withdrawn for good reason.

£40 · 20 minutes

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6am to 10pm, seven days

Assessed and treated by a GMC-registered GP

Prescriptions, sick notes and referral letters included

A written treatment plan after every appointment

Your NHS records in the room, with your consent

Clinically reviewed by Dr Mohammad Khan · Last reviewed

August 30, 2026

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A 20-minute appointment with a GMC-registered GP for £40. No membership required.

Private GP care led personally by Dr Mohammad Zubair Khan, GMC 7563469.

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Same-Day Appointments
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Blood Tests
Menopause & HRT
Weight Management
Mental Health
Specialist Referrals
Same-Day Appointments
Sick Notes
Private Prescriptions
Blood Tests
Menopause & HRT
Weight Management
Mental Health
Specialist Referrals

Overview

ME/CFS — myalgic encephalomyelitis, also called chronic fatigue syndrome — is a long-term condition causing profound fatigue, worsening after exertion, unrefreshing sleep and cognitive difficulty. NICE classifies it as a complex, chronic medical condition affecting multiple body systems. It is not a psychological illness and it is not deconditioning.

The single most important thing on this page is what changed in 2021.

NICE rewrote its guideline and told clinicians: do not offer graded exercise therapy, or any programme based on fixed incremental increases in activity. It also stated that cognitive behavioural therapy should be offered only as support for living with a chronic illness — not as a cure, and not on any assumption that the condition is psychological.

That reversal matters because the previous approach caused harm, and a great many people were told for years that they simply needed to try harder. If you were treated that way, you were not failing. The advice was wrong.

The second thing worth knowing: diagnosis can now be made at three months. The old requirement to wait four to six months, and often much longer in practice, delayed the one thing that genuinely helps — learning to pace before you have spent a year crashing repeatedly.

Common symptoms

The four features required for diagnosis

All four must be present, have persisted for at least three months, and not be explained by another condition:

  1. Debilitating fatigue — worsened by activity, not caused by excessive effort, and not significantly relieved by rest
  2. Post-exertional malaise — symptoms worsening after activity, often delayed by hours or days, disproportionate to what was done, and taking a disproportionate time to recover from
  3. Unrefreshing sleep or sleep disturbance — waking as tired as you went to bed, broken sleep, a reversed sleep pattern
  4. Cognitive difficulties — brain fog, slowed thinking, poor concentration, word-finding problems, worse after effort

Also very common

  • Orthostatic intolerance — feeling worse when upright, better lying down, sometimes with a racing heart
  • Widespread pain — muscles, joints, headaches
  • Flu-like feelings, sore throat, tender glands
  • Sensitivity to light, noise, touch, smells
  • Temperature dysregulation
  • Digestive problems
  • New sensitivities to foods, alcohol or medicines

Post-exertional malaise, described properly

This is the defining feature and the one most often misunderstood. It is not feeling tired after exercise. It is a whole-body worsening — pain, fog, flu-like symptoms, sometimes being unable to get out of bed — that arrives 12 to 72 hours after the effort and can last days or weeks.

The trigger can be trivial: a shower, a phone call, a difficult conversation, standing in a queue. Mental and emotional effort count as much as physical.

Severe and very severe ME

Around a quarter of people are severely affected — housebound or bedbound, sometimes needing tube feeding, unable to tolerate light, sound or touch, unable to speak.

These are the people most often disbelieved, and they are the ones who most need care. NICE explicitly requires home-based assessment and support for them. People have died from complications of very severe ME.

Causes and risk factors

What is understood

No single cause has been established, but the biological abnormalities are real and reproducible:

  • Immune system dysfunction, including altered cytokine patterns and natural killer cell function
  • Impaired energy metabolism at cellular level, with abnormal responses to repeat exercise testing
  • Autonomic nervous system dysfunction, explaining orthostatic symptoms
  • Neuroinflammation, found on some imaging studies
  • Genetic susceptibility, with large UK research studies underway

Common triggers

  • Viral infection — the commonest by far. Epstein-Barr (glandular fever), influenza, enteroviruses, and now COVID-19
  • Other infections — including Q fever and Lyme disease
  • Surgery, major trauma or a significant physical stressor
  • Sometimes no identifiable trigger at all

Who develops it

  • Women, roughly three times as often as men
  • Two peaks — teens and twenties, then forties and fifties
  • Children and adolescents, in whom it is the commonest cause of long-term school absence
  • A family history in some cases

What does not cause it

It is not caused by deconditioning, by unhelpful beliefs about illness, or by a fear of activity. Those models underpinned the previous treatment approach, and NICE moved away from them after reviewing the evidence.

How it is diagnosed

Clinically, on the four criteria

Suspect ME/CFS when all four features are present — debilitating fatigue, post-exertional malaise, unrefreshing sleep and cognitive difficulty — and confirm the diagnosis if they have persisted for three months and other causes have been excluded.

Importantly, NICE says to begin management from the point of suspicion, without waiting for the three months to elapse. Energy management started early prevents a great deal of avoidable damage.

The exclusion tests

These must be done. There is no test for ME/CFS, but there are tests for the things that look like it and are treatable:

  • Full blood count, ferritin
  • Thyroid function
  • Kidney and liver function, calcium, glucose or HbA1c
  • CRP and ESR
  • Coeliac screen
  • B12, folate, vitamin D
  • Creatine kinase, where muscle pain or weakness is prominent
  • Urine testing

Further tests only where something in the history points to them — not an indefinite search that delays diagnosis for years.

Assessing orthostatic intolerance

Lie for ten minutes, record heart rate and blood pressure, then stand and record at intervals for ten minutes. A sustained rise of 30 beats per minute, with symptoms, suggests PoTS. Do it at home and bring the readings — for many people, doing it in a surgery is itself too costly.

What else it might be

Anaemia, iron deficiency without anaemia, hypothyroidism, coeliac disease, diabetes, sleep apnoea, depression, an autoimmune condition, Addison's disease, or a medication effect.

Depression is worth distinguishing carefully. In depression, people generally feel worse before activity and often somewhat better afterwards. In ME/CFS, people want to do things and are punished for doing them, sometimes days later.

Overlap

Fibromyalgia and long COVID overlap substantially with ME/CFS, and many people meet the criteria for more than one. The management approach is largely shared.

How we treat it online

Remote consultation is not a compromise for this condition — for many people it is genuinely better. Travelling to a surgery, sitting in a waiting room and holding a conversation can cost days of recovery. Being assessed from your own bed, with the curtains closed, costs nothing.

What we do

  • Believe you. This should not need saying, and for most people with ME/CFS it does
  • Arrange the exclusion tests — anaemia, iron deficiency, thyroid, coeliac, B12, diabetes, kidney, liver, inflammatory markers. These must be done, and they must be normal, before the diagnosis is made
  • Make the diagnosis at three months where the criteria are met, rather than leaving people in limbo
  • Teach energy management properly — the energy envelope, activity diaries, planned rest, and how to recognise the early signs of a crash
  • Assess for orthostatic intolerance and PoTS, with a lying and standing heart rate you can do at home
  • Manage symptoms — pain, sleep, headaches, nausea, and medication sensitivity, which is common and means starting at very low doses
  • Sick notes, work adjustment letters and benefit evidence. Detailed, specific documentation that reflects fluctuation and post-exertional malaise, which standard assessments handle badly
  • Referral to a specialist ME/CFS service where one exists locally
  • Longer and repeat consultations, at a pace that suits you, in writing where speaking is difficult

What we will not do

  • Recommend graded exercise therapy. NICE says do not offer it, and we do not
  • Suggest this is psychological, or that CBT will cure it
  • Sell unproven treatments. The private market around ME/CFS is full of expensive protocols with no evidence, and we will say so about any of them
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Important

When to seek urgent help

Call 999

  • Unable to swallow, or unable to take fluids — in very severe ME this becomes a medical emergency and is repeatedly underestimated
  • Signs of dehydration or malnutrition — confusion, very little urine, rapid weight loss
  • Chest pain, severe breathlessness, or collapse
  • Sudden weakness, numbness, or difficulty speaking
  • Thoughts of ending your life — call 999, or Samaritans on 116 123

Urgent assessment

  • A marked deterioration that does not fit your usual pattern
  • Difficulty eating or drinking enough — NICE requires this to be treated as serious and referred urgently
  • New symptoms that are not part of your ME — unexplained weight loss, night sweats, a lump, or bleeding
  • Fainting on standing

The risk of the label

Once you have an ME/CFS diagnosis, new problems get attributed to it. Cancers, thyroid disease, heart problems and anaemia continue to happen to people with ME.

If something is genuinely new or different, insist it is assessed on its own terms. This happens often enough that it is worth saying directly at the start of an appointment.

If you are severely affected

NICE requires that people who cannot attend appointments are assessed at home. You are entitled to that. If it is refused, that is not consistent with the guideline, and it is worth saying so in writing.

Prevention and self-care

Energy management — the core of it

NICE describes this as staying within your energy limits, planned by you, with support. It is not a graded programme and it does not aim at incremental increase.

  • Establish your baseline — the level of activity you can sustain on a bad day without triggering a crash. Start below what feels possible
  • Include everything. Cognitive, emotional, social and sensory activity all draw on the same budget as physical activity
  • Rest before you need to, in planned blocks, in a quiet dark room
  • Keep a diary for several weeks. The delay between doing and crashing makes the pattern invisible otherwise
  • Beware the good day — the boom and bust cycle is the commonest reason people fail to stabilise
  • Increase only after a sustained period of stability, in very small increments, and go back down if symptoms worsen
  • Accept that the limit may not move. Stabilising is a legitimate goal in itself

Sleep

  • Regular times, and avoid long daytime sleeps that displace night sleep
  • Rest without sleeping during the day — lying quietly, no screens
  • Expect sleep to be unrefreshing regardless. That is part of the condition, not a failure of sleep hygiene

If being upright is hard

Increased fluids and salt — check first if you have high blood pressure — compression garments, standing up slowly, raising the head of the bed, and recumbent rather than upright positions.

Medication

People with ME/CFS are frequently sensitive to medication. Start any new drug at a fraction of the usual dose and increase very slowly. Say this to any prescriber — it is recognised in the NICE guidance and is often not known.

Practical support

  • Aids and adaptations — shower seat, perching stool, wheelchair. Using a wheelchair is not giving up; it conserves energy for things that matter
  • Blue Badge, PIP, Access to Work, and a social care assessment
  • Ask for reasonable adjustments at work or school. ME/CFS usually meets the Equality Act definition of disability
  • Action for ME and the ME Association, both of which provide reliable information

NHS or private

What the NHS provides

  • Diagnosis and the exclusion blood tests are free, and this is entirely within a GP's scope
  • Specialist ME/CFS services exist in some areas, though provision is patchy and several have closed
  • Home visits are required by NICE for people who cannot attend, and you are entitled to ask for one
  • Occupational therapy, dietetics and social care assessment, all free

The problem worth naming

Not every service has caught up with the 2021 guideline. Programmes based on graded increases in activity are still occasionally offered, sometimes under a different name.

You are entitled to decline them, and to ask that the recommendation be recorded. The guideline is clear and citing it is reasonable.

Where a private consultation adds something

  • Getting diagnosed rather than left in limbo. Years of uncertainty are common and they are avoidable — the criteria can be applied at three months
  • Time, and consultations paced to what you can manage, including in writing or over several shorter sessions
  • Not having to travel, which for many people is the deciding factor
  • Documentation that actually works — benefit and work letters describing fluctuation, post-exertional malaise and functional limits in the terms assessors need to see
  • A written second opinion, if you have been given advice inconsistent with current guidance
  • Careful prescribing, at the reduced starting doses this condition often requires

On paid treatments

There is a large private market selling recovery to people with ME/CFS — mind-body retreats, brain retraining programmes, intravenous infusions, extensive supplement protocols, unvalidated testing. None has good trial evidence, and some cost thousands.

We will give you a straight answer about any of them. Being desperate for a way out is entirely understandable, and it is being monetised.

Evidence and guidelines

This page follows NICE guideline NG206 on myalgic encephalomyelitis (or encephalopathy) / chronic fatigue syndrome, published in 2021, alongside NICE Clinical Knowledge Summaries.

What the guidance actually says

  • ME/CFS is a complex, chronic medical condition affecting multiple body systems, which can be severely disabling
  • Suspect ME/CFS if all four criteria are present — debilitating fatigue, post-exertional malaise, unrefreshing sleep, and cognitive difficulties — and confirm the diagnosis after 3 months of persistent symptoms
  • Do not delay management while awaiting the 3-month point; provide advice on energy management from the point of suspicion
  • Do not offer any programme based on fixed incremental increases in physical activity or exercise, including graded exercise therapy, or any programme using deconditioning or fear-avoidance as its theoretical basis
  • Cognitive behavioural therapy may be offered to support people to manage their symptoms and reduce distress, but should not be offered as a treatment or cure, and does not assume a psychological cause
  • Energy management should be person-led, based on the individual's energy limits, and include cognitive, emotional and social activity as well as physical
  • Recognise that people with ME/CFS may be more sensitive to medicines, and start at lower doses than usual
  • People with severe or very severe ME/CFS should have care delivered at home where they cannot attend, with recognition that difficulty eating and drinking requires urgent assessment
  • Investigations should exclude alternative diagnoses without subjecting people to prolonged or repeated unnecessary testing
  • Assess for orthostatic intolerance, including postural tachycardia

On the change of approach

The 2021 guideline replaced the 2007 recommendations following a review of the evidence, and reflects concerns about the quality of the evidence supporting graded exercise therapy and reports of harm from people with ME/CFS.

Reviewed against NICE NG206 and NICE CKS guidance current at the date shown above.

Common questions

Should I be doing graded exercise?

No. NICE says do not offer it, and that is unambiguous.

Any programme built on fixed incremental increases in activity is not recommended for ME/CFS, whatever it is called. If one is offered, you can decline it and ask for that to be recorded.

So is this psychological?

No. NICE classifies ME/CFS as a complex chronic medical condition affecting multiple body systems.

CBT may help you cope with a chronic illness — as it might with cancer or diabetes — but it is not a treatment for ME/CFS and does not assume a psychological cause.

How long before I can be diagnosed?

Three months, if all four criteria are met and other causes have been excluded.

And management should start as soon as it is suspected — there is no reason to leave someone without energy management advice while a clock runs down.

What exactly is post-exertional malaise?

A whole-body worsening after activity, typically delayed by 12 to 72 hours, disproportionate to what was done, and slow to recover from.

It is not tiredness after exercise. The trigger can be a shower or a phone call, and mental effort counts as much as physical.

Will I recover?

Some people improve substantially, particularly younger people and those diagnosed early. Many stabilise at a reduced level with fluctuation.

Full recovery in adults who have been ill for years is less common, and we would rather be honest about that than promise something we cannot deliver.

How is it different from depression?

The key difference is what activity does. In depression, people often feel somewhat better after doing something. In ME/CFS, activity makes you worse, sometimes days later.

People with ME/CFS generally want to do things and cannot. That distinction matters, and depression can of course develop alongside.

Why do I react badly to medication?

Medication sensitivity is recognised in ME/CFS, and NICE specifically advises starting at lower doses than usual.

Say this to any prescriber — it is frequently not known, and starting at a normal dose can cause a significant setback.

I am too unwell to get to an appointment. What do I do?

NICE requires that people who cannot attend are seen at home. You are entitled to ask for that.

A remote consultation is also a genuine option — from bed, in a dark room, in writing if speaking is too much.

Is it the same as long COVID?

They overlap heavily, and many people with long COVID meet the ME/CFS criteria.

Post-exertional malaise is the shared feature that matters most, and where it is present the management is essentially the same.

Is it worth paying for one of the recovery programmes I keep seeing?

Brain retraining programmes, infusions, extensive supplement protocols and unvalidated testing have no good trial evidence, and costs run into thousands.

Ask what randomised evidence exists before paying anything, and we will give you a straight answer about any specific one.

Dr Mohammad Zubair Khan, GMC-registered private GP and founder of Cheshire Clinics
Clinically reviewed by Dr Mohammad Zubair Khan, GMC 7563469
Last reviewed

August 30, 2026

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How we compare

Time to be seen

Appointment length

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Told when a test isn’t needed

Cost

Varies by practice

Typically 10 minutes

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Usually

Free

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Questions about our service

How quickly can I be seen?

Same-day access is usually available, from 6am to 10pm, seven days a week. You choose a time that suits you rather than waiting on hold at 8am.

Will I see the same doctor each time?

Yes. Care is led personally by Dr Mohammad Khan, so you are not passed between clinicians. Continuity is the point of a small practice: someone who knows your history and is listening attentively rather than working through a checklist.

Can you see my NHS records?

Yes, with your consent. We can access your Summary Care Record during the consultation, so your current medications, allergies and significant history are in the room. That means fewer questions you have already answered elsewhere, and safer prescribing.

Are you trying to replace my NHS GP?

No. We are not here to replace GPs, only to support them. Your NHS practice remains responsible for your ongoing care, and with your consent we write to them after the consultation. We are useful when you need to be seen sooner, or want more time than a standard appointment allows.

What is included in the appointment?

Twenty unhurried minutes and a comprehensive assessment. A written treatment plan is included, along with any prescription, sick note or referral letter arising from the consultation, at no extra charge.

How much does it cost?

£40 for 20 minutes, self-pay. Membership is optional and never required. Priced for fairness, because we are not here to charge extortionate amounts for access to a doctor.

What does “treatable online” actually mean?

It means the diagnosis can usually be made from your history and photographs, and that treatment can be arranged safely without examining you. Where a condition is not marked treatable online, it is because examination is the diagnosis — listening to a chest, feeling an abdomen, examining an ear or a joint — or because a procedure or device is needed.

Can you prescribe antibiotics?

Yes, where there is a genuine bacterial infection — cellulitis, impetigo, bacterial urine infections, confirmed strep throat. We will also frequently tell you that you do not need one. Most sore throats, coughs, colds and earaches are viral, and an antibiotic gives you the side effects with none of the benefit.

What if the GP cannot help with what I need?

If your problem turns out to be genuinely outside what we can do remotely, the doctor will tell you straight away, point you to the right service, and refund your fee in full. We would rather do that than fill twenty minutes to justify the charge.

What should I do in an emergency?

Call 999 or go to A&E — do not book an online appointment and do not wait for a reply to an email. For urgent problems that are not emergencies, NHS 111 is available 24 hours a day, online or by phone, and can direct you to the right service.

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