Does Crohn's disease cause unintentional weight loss?

Inflammation can reduce appetite, increase fatigue and make eating uncomfortable. Diarrhoea or inflammation in the small bowel may interfere with digestion and absorption, while avoiding foods to control symptoms can narrow the diet. Weight may fall during active disease and can be accompanied by abdominal pain, loose stools, blood in stool or a general loss of strength. A steady change should be discussed even when bowel symptoms seem mild.

Arrange a medical review and bring a record of weight changes, appetite, bowel symptoms, food tolerance and medicines. Aim for regular, nourishing meals that you can manage, with advice from a dietitian if eating has become difficult. Keep fluids up when diarrhoea is present. Do not remove major food groups or take supplements without professional guidance, because the right plan depends on your symptoms and nutritional needs.

Seek prompt medical care if weight is falling quickly, you cannot eat or drink, you have repeated vomiting, severe abdominal pain, heavy bleeding, fainting or marked weakness. Urgent assessment is also appropriate when weight loss occurs with fever, persistent night symptoms or signs of dehydration. A clinician may check hydration, nutrition, inflammation and other possible explanations.

Ask whether the weight change suggests active Crohn's inflammation, reduced absorption, an eating limitation or another cause. Discuss nutritional tests, a dietitian referral, treatment adjustments and a safe plan for monitoring your weight and strength.