There is no clinical term for the 5 signs before the onset of cancer. However, early cancer patients may have symptoms such as loss of appetite, digestive abnormalities, body wasting, abnormal body temperature, abnormal urination and defecation, and so on. 1. Loss of appetite: Early-stage cancer patients may suffer from invasion of cancer cells, which may lead to symptoms of loss of appetite; in addition, patients with advanced stage of cancer may suffer from symptoms of inability to eat. 2. Wasting: Early-stage cancer patients will consume a large amount of nutrients in their bodies because of the abnormal growth of cancer cells due to the invasion of cancer cells into their bodies, which will finally lead to wasting of their bodies. Especially stomach cancer and esophageal cancer patients can’t eat normally, which will lead to body wasting. 3. Abnormal body temperature: As the physical quality of early-stage cancer patients is relatively low, they are more likely to be invaded by pathogens than those with strong resistance, resulting in abnormal body temperature symptoms such as fever in early stage. 4. Abnormal urination and defecation: Early stage cancer patients usually have abnormal urination and defecation, and sometimes have constipation, diarrhea, blood in stool and other abnormal phenomena. 5. Digestive abnormalities: patients’ bodies may also give out digestive abnormalities, because the cancer in the patient’s body may be in the digestive system, which will lead to vomiting, nausea, diarrhea, abdominal pain and other digestive abnormalities. It is suggested that cancer patients should actively cooperate with doctors and carry out treatment under doctors’ guidance, and patients should also keep a good state of mind.