Lung cancer sign: Wheezing
Wheezing can also be caused by a cancer blockage in an airway. When an airway is constricted or narrowed, the air can make a wheezing or whistling sound as it moves through, explains Flores.
Lung cancer sign: Chest pain
Your chest wall has numerous nerve fiber endings, says Flores, so lung cancer that's invading your chest wall can cause pretty severe pain. It might get worse with deep breathing, coughing, or laughing, according to the American Cancer Society.
However, chest pain can also simply be a side effect of excessive coughing (rather than an indicator that cancer is growing into your chest wall), he says—a chronic cough can strain muscles.
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