The symptoms of lung cancer can vary, and it is important to be vigilant for early diagnosis. Common symptoms include a chronic and worsening cough, shortness of breath, wheezing, unexplained fatigue, weight loss, and decreased appetite. More severe symptoms may include bloody sputum, chest, back, and shoulder pain, difficulty swallowing, persistent hoarseness, recurrent lung infections, swelling in the face and neck (edema), sudden clubbing of the fingers, headaches and dizziness, weakness or numbness in the limbs, jaundice, and the formation of a lump in the neck. Individuals who notice any of these symptoms are advised to consult a healthcare professional without delay.