In clinical practice, it is often seen that patients are already in the middle to late stage of cancer when they first seek medical treatment, and when they ask about their medical history, they often find that they have been suffering from certain uncomfortable symptoms for a few months or even half a year or more, but they did not seek medical treatment because they did not pay attention to them, and they lost the opportunity to be able to treat the disease at its root cause. Any kind of disease will always show some signals (uncomfortable symptoms or signs) on the eve of the onset of the disease. Cancer is the same, there will be some early symptoms, if you know these signals, it is possible to early detection, early treatment, so as to improve the cure rate. What are the common signals of cancer? (1) Choking sensation when swallowing food, pain, tightness and discomfort behind the sternum, foreign body sensation in the esophagus or pain in the upper abdomen are the first sign of esophageal cancer. (2) Upper abdominal pain People used to call it heartburn. If you are usually well, but gradually find discomfort or pain in stomach (equivalent to upper abdomen), and cannot relieve it by taking pain-relieving and acid-relieving medicines, and have a feeling of fullness and bloating in upper abdomen, and continue to have poor digestion, you should be alert to the occurrence of gastric cancer at this time. (3) Irritating cough with prolonged cough or bloody sputum Lung cancer mostly grows in the wall of bronchial tubes. Due to the growth of cancer cells, it destroys the normal tissue structure and strongly stimulates the bronchial tubes, causing cough. It cannot be well relieved by antibiotics and cough suppressants, and gradually worsens with occasional bloody sputum and chest pain. This kind of irritating cough is often regarded as an early signal of lung cancer. (4) Breast lumps Normal female breasts are soft. If the lump is touched and the age is over 40, the possibility of breast cancer should be considered. (5) Abnormal vaginal bleeding Normal women menstruate once a month and usually do not experience vaginal bleeding. If bleeding occurs after sexual intercourse, it may be a sign of cervical cancer. Bleeding after sexual intercourse is usually small in amount. If attention is paid to it, early cervical cancer may be detected. (6) Nasal discharge with blood Nasal discharge with blood is mainly manifested as a small amount of blood in nasal discharge, especially in the morning, which is often an important signal of nasopharyngeal cancer. Nasopharyngeal cancer, except for nasal discharge with blood, is often accompanied by nasal congestion, which is due to the compression of nasopharyngeal cancer mass. This is due to the compression of nasopharyngeal cancer mass. If the cancer presses the Eustachian tube, tinnitus will also appear, so bloody nasal discharge, nasal congestion, tinnitus, headache, especially one-sided migraine, are all dangerous signals of nasopharyngeal cancer. (7) Abdominal pain, falling, blood in stool Any person over 30 years old who has abdominal discomfort, hidden pain, abdominal distension, change of bowel habit, feeling of falling and blood in stool, followed by anemia, fatigue, and feeling lumps in abdomen should consider the possibility of colorectal cancer. The limited and intermittent pain along the intestines is the first alarm signal of colorectal cancer. Obvious falling sensation with blood in stool is often a signal of rectal cancer. (8) Right subcostal pain Right subcostal pain and right upper abdomen are often called liver pain, which is common in hepatitis, cholecystitis, cirrhosis and liver cancer. Hepatocellular carcinoma starts insidiously and develops rapidly, and some patients are diagnosed with hepatocellular carcinoma only after their right subcostal pain lasts for several months. Therefore, right subcostal pain should be regarded as a signal of liver cancer. (9) Headache and vomiting Headache occurs mostly in the morning or at night, and is often obvious in the forehead, occiput and both sides. Vomiting is not related to eating and often occurs with the aggravation of headache. Headache and vomiting are common clinical symptoms of brain tumor, and should be regarded as danger signals of intracranial tumor; CT examination is helpful to confirm the diagnosis. (10) Long-term unexplained fever Cancers of hematopoietic system, such as malignant lymphoma and leukemia, often have fever. The clinical manifestation of malignant lymphoma is painless progressive lymph node enlargement, and along with the lymph node enlargement, patients may have fever, emaciation, anemia and other symptoms. Therefore, long-term unexplained fever should be suspected as a signal of hematopoietic malignant tumor. When all the above suspicious signals appear, you should neither be rash nor take it lightly. You should go to the hospital in time and take necessary examinations to make a clear diagnosis, so as not to delay the condition and cause lifelong regrets.