Stomach, pancreatic, or liver cancer (affecting digestion and metabolism);
lung or esophageal cancer (interfering with swallowing and appetite);
blood cancers (leukemia, lymphoma) (affecting metabolism and immune function).
If you experience persistent weight loss without a clear reason, consult a doctor for an evaluation. 2. Persistent fatigue and weakness
Feeling constantly exhausted even after sufficient rest can be an early sign of cancer. Unlike normal fatigue, cancer-related fatigue is persistent, severe, and does not improve with sleep or rest.
