Esophageal cancer
While heartburn is extremely common and usually harmless, worsening or persistent symptoms deserve medical review.
9. Changes in a Mole or Skin Lesion
Skin cancer, including melanoma, often begins with subtle skin changes.
Warning signs include:
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Asymmetry
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Irregular borders
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Color variation
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Diameter larger than a pencil eraser
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Evolution (changing over time)
The ABCDE rule is commonly used to evaluate moles.
Early detection of melanoma dramatically improves outcomes.
10. Frequent Infections or Unexplained Fevers
Some blood cancers, such as leukemia or lymphoma, may cause:
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Frequent infections
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Low-grade fevers
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Night sweats
Because these symptoms resemble viral illnesses, they’re often dismissed.
Persistent or recurring infections should prompt testing.
