A feeling of constant fatigue, even after a sufficient rest, can be a sign of cancer alert. Unlike normal fatigue, cancer-related fatigue is persistent, intense, and does not improve with sleep or rest.
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Cancers potentially associated with fatigue:
Leukemia and lymphoma (affecting blood cell production and blood oxygenation)
Cancer of the colon or stomach (causing slow internal bleeding, which can lead to anemia)
Liver cancer (affecting detoxification and metabolism)
If extreme fatigue is accompanied by pallor, dizziness or shortness of breath, see a doctor immediately.
3. Skin Changes
The skin may reveal warning signs of internal cancer. Any newly appeared mole, size or skin discoloration that evolves over time should be examined.