Pancreatic, stomach, or esophageal cancer (affects digestion/appetite)
Lung cancer (reduces oxygen intake, increases metabolic demand)
Blood cancers like leukemia or lymphoma (disrupt metabolism and immune function)
📌 When to act: If you lose weight rapidly with no clear cause, see your doctor—even if you feel “fine.”
⚠️ 2. Persistent Fatigue That Doesn’t Improve with Rest
Not just “tired from work”—but deep, unrelenting exhaustion that sleep doesn’t fix.
Why it matters:
