Major Warning Signs You Have Lung Cancer

9. Swollen Lymph Nodes

Lymph nodes are tiny, bean-shaped glands that are part of your immune system. When cancer cells from the lung break away and enter the lymphatic system, they often travel to and become trapped in nearby lymph nodes, causing them to swell. Common locations for swollen nodes due to lung cancer include the neck (especially above the collarbone), armpit, or around the chest/collarbone area. Unlike nodes swollen from infection, cancerous nodes are often firm, non-tender, and do not shrink. Persistent, unexplained swelling in these areas, particularly if accompanied by other symptoms, necessitates a thorough medical check for cancer spread.

10. Persistent Chest, Back, or Shoulder Pain

Lung cancer pain isn't always sharp; it can manifest as a persistent, dull ache in the chest, back, or shoulder, often worsening with deep breathing, coughing, or laughing. This pain occurs when a tumor grows large enough to press on nerves, ribs, or the chest wall. Unlike muscle strains, cancer-related pain is typically constant and doesn't improve with rest or standard pain relievers. If you experience new, unexplained, or persistent pain in these areas, especially if it's localized and unrelated to injury, it's a crucial symptom that warrants prompt investigation, as it could indicate advanced disease.