Most people assume that symptoms of lung cancer are related strictly to the lungs and complications related to breathing. Sometimes this is accurate. Lung cancer often has symptoms like coughing up blood and mucus, shortness of breath, persistent cough, and chest pain. However, some symptoms seem to have nothing to do with the lungs. While there are many breathing-related symptoms of lung cancer, other surprising symptoms exist. Here are 9 surprising symptoms of lung cancer that don’t involve the lungs.