Understanding Bone Cancer: Ten Key Symptoms

5. Fatigue

Fatigue is often a telltale sign of cancer. When you find yourself in a constant state of drowsiness, you are fatigued. What makes fatigue so debilitating is the fact that it doesn’t go away with increased rest. It’s even more worrying when there is no apparent cause. Fatigue can be both mental and physical. The former refers to mental fog, or a state of reduced cognitive ability: difficulty remembering things, difficulty thinking or having trouble speaking. The latter refers to an overwhelming need to lay down and rest. If you notice yourself being often fatigued, consult your doctor.