Does cancer cachexia cause loss of appetite?

Cancer cachexia is a complex illness-related change in metabolism and body composition. It can reduce the desire to eat, make someone feel full after a small amount, or make food taste or smell different. Tiredness, nausea, pain, constipation, low mood, and treatment effects may further interfere with meals. A reduced appetite does not by itself identify the cause, so a clinician should consider the whole picture, including weight change, symptoms, medicines, and the underlying cancer.

Tell the cancer care team early if eating has become difficult. Keep a brief note of what is manageable to eat and drink, troublesome symptoms, and any changes since the last visit. Small, frequent portions may feel easier than a full plate. Choose foods with protein and energy when tolerated, and sip fluids through the day. A dietitian or clinician can help tailor options and treat contributors such as nausea, mouth soreness, pain, or constipation.

Contact the treating team promptly if intake is falling, swallowing is painful or difficult, vomiting prevents fluids, or weakness is increasing. Seek urgent medical help for confusion, fainting, severe breathlessness, or inability to keep fluids down. These signs need assessment regardless of whether cachexia is already known.

Ask what may be driving the appetite change, whether medicines or symptoms can be adjusted, and whether referral to a dietitian is appropriate. It can also help to ask which food and fluid changes fit your treatment plan and what changes should prompt a call.