Unexplained weight loss
Description: Sudden weight loss without a change in diet or increased physical activity.
Why it's dangerous: Many types of cancer release substances that alter metabolism and lead to rapid weight loss.
What to do: See a doctor, have blood tests, imaging tests (CT or PET), and review your diet.
Constant fatigue
Description: Feeling of constant exhaustion, even after a good night's sleep.
Why it's dangerous: Some cancers (such as leukemia or colon cancer) cause blood loss or reduced red blood cell production, resulting in chronic fatigue.
What to do: Perform a complete blood count and check for other possible causes of anemia or internal bleeding.
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