17. A Persistent Cough
A coughing fit could be a result of allergies, a cold, or even just food or water going down the wrong pipe. However, if that cough never seems to let up or go away, it could be a sign of something more sinister and serious like lung cancer. “Cancer in the airway can irritate your throat and make you cough,” says Dr. Flores. “There’s something in there that’s not supposed to be there, so your body is trying to get rid of it.” Cancer can also produce mucus, which only exacerbates a cough and makes it worse.
16. Shortness of Breath
If you become suddenly winded after climbing the stairs, or after your daily walk around the block, it could be a symptom of lung cancer. Short distances that suddenly leave you gasping for air are indications that you are either out of shape or suffering from lung cancer. “Shortness of breath can come from a tumor blocking the windpipe. It can also stem from an accumulation of fluid in the chest that pushes on the lung and leaves you with a lack of air,” says Dr. Flores. When cancer forms in the lining of the lungs, it causes fluid to build up in your chest, and even though your chest is capable of holding between three to four liters of fluid, when it completely fills up, the lungs are unable to get enough air, he says. Trouble breathing when you are sitting or lying down is also a sign of serious trouble.
15. Feeling Fatigued
We all experience fatigue every now and then, however, if you start to feel run down without having made any changes to your daily routine, it could be a sign of cancer. “It may not specifically signal lung cancer, but it is a definite red flag that something is not right,” says Dr. Flores. Weight loss and loss of appetite are also a sign of lung cancer, according to the American Cancer Society. Smoking, a family history of cancer, and asbestos exposure also increase your risk of developing lung cancer.Related: The Superfoods to Get Rid of Fatigue