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It's cold and flu season, so coughing can feel like a given. However, if your cough persists, it could indicate laryngeal, lung, or thyroid cancer or lymphoma. This was the most common symptom among survey participants. "We know coughs and colds are everywhere at the moment, and we're not suggesting everyone with a cough goes to their doctor," Whitaker said. "But if you have a symptom that doesn't go away or is unusual, don't be afraid to go to your doctor for advice."
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In Whitaker's study, 18% of people had experienced changes in the timing, amount, or size of their bowel movements. (Here are 10 things you get wrong about your poop.) While these disruptions are usually caused by certain foods or medication, if you notice it happens regularly over time, it could also be a sign of colon cancer.
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