Early manifestations of cancer patients may show symptoms of generalized weakness, which may be manifested as undifferentiated fatigue, i.e. the physical energy consumed by the patient is not proportional to the subjective fatigue of the organism and cognition. The reasons for cancer patients feeling weak all over may include: 1. Reduced energy intake: For example, patients suffering from early gastric cancer or early pancreatic cancer, the lesions are located in the digestive system, which may lead to symptoms such as loss of appetite and nausea and regurgitation. When the energy intake of patients is reduced, it may lead to the symptoms of general weakness of the body; 2. High consumption of the body: The growth of tumor cells in the body of cancer patients requires a lot of energy and nutrients beyond what the body needs. The consumption of energy leads to insufficient supply of nutrients to the body of early stage cancer patients, which may lead to symptoms of malaise; 3. Damage to central nervous system and endocrine system: When the autonomic motor signals generated by the central nervous system of early stage cancer patients cannot be transmitted, it may lead to the feeling of malaise in the body. In addition, such as neuroendocrine tumors, endocrine disorders of different degrees may occur, causing body weakness; 4. Chronic inflammation: due to the presence of cancer cells, the immune function of the body may be dysfunctional, resulting in the release of inflammatory factors, making the body in a state of chronic inflammation, which may cause body weakness; 5. Psychological factors: due to cancer, there may be different degrees of negative, pessimistic 5. Psychological factors: Due to cancer, patients may have different degrees of negative, pessimistic, depressive and other emotions, which may cause general weakness and lack of energy. Although affected by different disease types, lesion locations, clinical manifestations and other factors, patients with early-stage cancer may have similar symptoms of feeling weak, which can be relieved mainly through the following ways: 1. General treatment: Patients should be given sufficient rest, avoid overexertion, undergo timely examination and receive treatment under the guidance of doctors. Pay attention to nutrition in daily life, eat some nutritious food, ensure a healthy and reasonable diet structure, and also exercise appropriately to help improve physical fitness; 2, surgical treatment: patients should actively receive surgical treatment of the primary lesion or other local treatment such as radiofrequency and radiotherapy; 3, other treatments: for some patients with high risk of recurrence, chemotherapy and other drug treatments can be used to reduce the risk of recurrence and metastasis.