IBD fatigue: what should you know?

Fatigue may feel like heavy tiredness, reduced stamina, slowed thinking, or needing more recovery after ordinary tasks. During a flare, inflammation and frequent bowel movements can drain energy. Blood loss or reduced absorption can contribute to anaemia, while pain, urgency and disrupted sleep can leave you unrefreshed. Fatigue can continue even when bowel symptoms seem quieter, so its pattern is worth recording rather than dismissing it as simply being busy.

Other health problems can also cause tiredness, including [Anaemia](/conditions/anaemia/) and [Dehydration](/conditions/dehydration/). Fatigue alone cannot identify its cause.

Note when fatigue appears, how it affects work or daily tasks, your sleep, bowel symptoms, bleeding, food and fluid intake, and any recent medicine changes. Take prescribed IBD treatment as directed and do not start iron or supplements without advice, because the cause of fatigue should be checked first. Gentle activity, regular meals and fluids may help you maintain strength; balance activity with planned rest. A clinician may review inflammation, blood counts, nutrition, medicines and sleep.

Persistent tiredness may overlap with [Burnout](/conditions/burnout/), [Chronic Fatigue Syndrome](/conditions/chronic-fatigue-syndrome/) or other conditions, but these should not be self-diagnosed.

Arrange medical review if fatigue is new, worsening, limiting normal activities, or accompanied by a flare, ongoing diarrhoea, blood in stool, weight loss, fever, breathlessness or palpitations. Seek urgent help for severe weakness, fainting, confusion, inability to keep fluids down, or heavy bleeding. These warning signs need assessment regardless of whether IBD is already diagnosed.

Could active inflammation, anaemia, dehydration, poor sleep or a medicine be contributing? Which tests would clarify the cause? How should I pace activity during a flare? What symptoms mean I should contact the IBD team promptly?