'I became more aware of my actions'-A qualitative longitudinal study of a health psychological group intervention for patients with myalgic encephalomyelitis/chronic fatigue syndrome.

Objectives: To explore myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients' experiences of a health psychological group intervention and its usefulness, non-usefulness or harmfulness for illness management and adjustment.

Design: A qualitative longitudinal study using inductive content analysis.

Methods: Semistructured interviews were conducted with 10 adults.