The symptoms of weakness, sleepiness and easy fatigue may be manifested by cancer, but other reasons such as lack of sleep recently may also cause them, so specific analysis is needed. Cancer patients can show symptoms such as weakness, sleepiness and fatigue, especially in advanced stage tumor patients, where the body is more seriously consumed, leading to such symptoms. However, the sudden appearance of fatigue in normal people may be due to lack of sleep and prolonged mental tension, which can generally be recovered by adjusting work and rest. During pregnancy or menstruation, women may also experience fatigue and weakness, and need to be rested in bed. If the patient is too worried or has other symptoms, it is recommended to visit the endocrinology department of a regular hospital to improve the examination under the guidance of the doctor and carry out relevant treatment after clarifying the cause. In addition, lack of physical exercise may also produce symptoms, so pay attention to increase the exercise time to promote metabolism.