Constant tiredness that doesn’t improve with rest could indicate more than stress. Cancer cells consume energy, weaken your immune system, and interfere with nutrient absorption, leaving you feeling drained.
2. Sudden, Unexplained Weight Loss
If you lose more than 5–10% of your body weight in a short period without dieting or exercise, it may be a red flag. Many cancers, especially those of the stomach, pancreas, and lungs, cause rapid weight loss.
