Detailed answer

Dark spots, also known as hyperpigmentation, are not typically a direct sign of lung cancer. Hyperpigmentation is caused by an overproduction of melanin, the pigment that gives color to our skin. However, dark spots can sometimes appear as a result of certain medications or medical conditions. In the case of lung cancer, common symptoms include persistent cough, chest pain, shortness of breath, and unintended weight loss. It's important to consult a healthcare professional if you are experiencing any concerning symptoms or changes in your skin.