What is fatigue? Fatigue is the subjective feeling of an individual. Even if he/she has enough sleep, he/she still feels an unbearable and constant sense of tiredness, and his/her physical and mental functions are significantly reduced, which will interfere with his/her performance of daily life functions. Fatigue in cancer patients can occur at any time and cannot be effectively improved by rest or sleep. Causes of fatigue 1. When cancer patients undergo chemotherapy or radiation therapy, cells are destroyed and die, and metabolic wastes are released, resulting in easy fatigue during the treatment period. 2. 2.Fever, nausea, vomiting, anemia, pain, and good nutritional status occur as a result of treatment, causing abnormal metabolic changes or imbalance, which will lead to fatigue. 3.Decrease in physical activity and sleep disorders due to disease or treatment will increase the feeling of fatigue. Fatigue self-care 1, eat more high-calorie, high-protein, fresh fruits and vegetables, if there is no contraindication to at least 3,000 cc of water intake per day. 2, 3-5 times a week, daily 30-45 minutes of brisk walking, cycling, jogging, dancing and other aerobic exercise, is the most commonly used and one of the most effective way to deal with fatigue. 3.Plan the necessary daily activities, prioritize activities or postpone non-essential activities; save personal energy in quantity to save physical exhaustion, such as sitting down to do things, avoid bending and stooping, use relaxing home appliances, put supplies in easy-to-access places, sit in a chair in the shower room, and use a large bath towel when drying the body. 4.According to the activity meter, increase the amount of physical activity during the day, and take a nap during the day without affecting your sleep at night. 5.Listening to music, watching movies or reading, as well as deep breathing exercises, massage and guided imagery to achieve relaxation and divert attention from fatigue.