Fatigue is extreme tiredness and exhaustion. It doesn't always go away with rest or sleep and may affect you physically and emotionally.
Fatigue is a common and disabling symptom in breast cancer patients and survivors. A rather nebulous concept, fatigue overlaps with sleepiness and depressed.
Fatigue is the most common side effect of breast cancer treatment. Some doctors estimate that 9 out of 10 people experience some fatigue.