Substantial weight loss without any changes to diet or activity level can indicate a variety of underlying illnesses, including lung cancer. Weight loss can be a side effect of the body burning more energy to fight infection or an underlying cancer; it can also be due to the feeling of fullness some people with cancer experience after eating a small meal. Furthermore, when it is hard to breathe, it is even more challenging to eat. Significant loss of appetite is also common in the later stages, when the cancer has spread to the liver. However, weight loss can be an early sign of lung cancer too, and may occur before the cancer is diagnosed.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.