Lung cancer is one of the most common cancers worldwide. It begins when abnormal cells grow uncontrollably in the lungs, interfering with normal breathing and oxygen flow. Understanding the warning signs, possible triggers and available treatments can help people recognize concerns early and make informed decisions about care. Symptoms of lung cancer can vary widely depending on how advanced the disease is. Some signs appear early and are easy to overlook, while others develop later as the cancer spreads or grows larger. Early lung cancer often causes mild or vague symptoms, which is why it can be difficult to detect at first. As lung cancer progresses, symptoms tend to...