Chronic fatigue syndrome

Myalgic encephalomyelitis/chronic fatigue syndrome, often shortened to ME/CFS, is a long-term illness that can substantially limit daily life. A key feature is post-exertional malaise: symptoms worsen after physical or mental activity that was previously manageable. It is more complex than ordinary tiredness and requires careful assessment.

What is post-exertional malaise?

Someone may feel noticeably worse after tasks such as shopping, studying or a social visit. The worsening can be delayed, so the connection is not always obvious on the same day. Sleep may feel unrefreshing, and thinking, concentration, pain or upright tolerance may also be affected.

A diary can help show what happened before a deterioration and how long recovery took. Record manageable activity as well as difficult days. Do not use the diary as a target that forces you to increase activity regardless of symptoms.

For the Australian guidance behind this explanation, see Healthdirect Australia: Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS).

How is ME/CFS assessed?

There is no single routine test that confirms it. A doctor reviews the symptom pattern, duration and effect on your life, while checking for other causes of fatigue. Normal initial blood tests do not mean your experience is imaginary. Equally, a previous diagnosis should not stop new symptoms being investigated.

Management is individual and may involve adjusting activity to avoid repeated setbacks, addressing specific symptoms and arranging support. A generic exercise programme that ignores post-exertional worsening is not an appropriate self-management assumption. Discuss pacing and realistic goals with a clinician familiar with the condition.

How can appointments be made more manageable?

Ask whether a shorter appointment, written symptom summary or support person would help. Prioritise the issues that most affect daily function and agree on follow-up. Telehealth can reduce travel demands, but examination or testing may still be needed. Seek urgent care for new severe symptoms such as chest pain, collapse or serious breathing difficulty rather than attributing everything to ME/CFS.

Where to go next

Read online doctor consultations to understand the relevant service. A doctor decides whether a consultation, examination, referral or another pathway is appropriate for your situation.