Does tuberculosis cause unintentional weight loss?

Tuberculosis can reduce appetite and increase the body's inflammatory response, so a person may eat less and lose weight without intending to. Weight loss may occur alongside a persistent cough, fever, night sweats, tiredness, or weakness, especially when tuberculosis affects the lungs. It can also result from digestive illness, thyroid problems, diabetes, medication effects, stress, or other infections. The amount and pace of change, appetite, bowel symptoms, and your wider health help guide the assessment.

Make a medical appointment if weight is falling without a planned change in food or activity, particularly when you also have fever, cough, night sweats, poor appetite, or unusual fatigue. A clinician may review your weight history, examine you, and choose tests based on your symptoms and any tuberculosis exposure. Mention contact with tuberculosis, previous treatment, travel, immune conditions, and medicines. Keep a record of appetite, symptoms, and weight changes, and continue fluids and nourishing foods if you can tolerate them.

Seek urgent help for severe breathlessness, chest pain, coughing blood, confusion, fainting, or inability to keep fluids down. Contact a clinician promptly when weight loss is continuing or paired with persistent fever or cough. If tuberculosis is suspected, ask about precautions around close indoor contact while testing is arranged.

Ask what may be driving the weight change, whether tuberculosis testing is appropriate, which tests are planned, and how to support nutrition while the cause is being investigated.