Cancer fatigue is a distressing persistent sense of tiredness that is related to cancer or cancer treatment and occurs despite adequate sleep and rest. It is different from the typical tiredness that most people experience. This type of fatigue can be both physical and emotional, leading to a lack of energy, weakness, and a feeling of exhaustion that is not proportional to any recent activity. It can significantly impact a person's ability to carry out daily activities and can cause more distress than other symptoms such as pain, nausea, vomiting, or depression. read more >>

It often gets better when you rest. Cancer-related fatigue is worse and it causes more distress. It's not the tired feeling people remember having before they had cancer. ... For some people, this kind of fatigue causes more distress than pain, nausea, vomiting, or depression.read more >>