If cancer can be detected and diagnosed early, most patients can be cured. Therefore, patients will not take the initiative to go to the hospital for examination, and once the state is obvious, it is often too late for some symptoms and signs that may be related to early cancer, which can be called “early signs” or “warnings”. 1. Breast lumps: a sign of breast cancer After puberty, girls can conduct breast self-examination and go to the hospital in time to rule out the possibility of breast enlargement if there are hard lumps. If there is nipple overflow or the skin appears orange peel-like, you should be careful of breast cancer. 2. Difficulty in swallowing: a sign of esophageal cancer Difficulty in swallowing of esophagus-related tumors is mostly manifested as eating dry things, unable to swallow and must be solved by drinking water, while some people will have pain behind the sternum when eating. 3.Iron deficiency anemia: a sign of colon cancer If it is a young girl, having a period or dieting to lose weight, etc. can also lead to iron deficiency anemia, and the possibility of colon cancer is small. If it appears in middle-aged or old people, it is better to do fecal occult blood examination. 4. Rectal bleeding: a sign of age-related intestinal cancer Rectal bleeding manifests itself as blood in the stool, and the appearance of blood in the stool should first be distinguished from hemorrhoids, which are blood in the stool, while tumors are mixed with blood on the stool. In fact, the more obvious symptom of rectal tumor is that the stool is very thin because the tumor is blocked. 5.Blood in urine: indicates cancer of urinary tract Cancer of urinary tract mainly refers to bladder tumor, if there is blood in urine and it is not painful, you should be careful. 6.Coughing up blood: indicates lung cancer. Young people coughing up blood is mostly tuberculosis, while older people, after excluding bronchial dilatation, should take a film if they have blood in sputum or dry cough with blood. Coughing up blood may be advanced cancer. It is recommended that people over 40 years old, who usually smoke a pack of cigarettes daily and have smoked for more than 20 years, should have regular radiographs. 7. Post-menopausal bleeding: a sign of gynecology-related cancer Post-menopausal bleeding, first see if you are taking drugs and health care products containing female hormones, such as progesterone and estrogen, especially some health care products that claim to restore youth. Do gynecological examination in time and don’t delay. 8. Rectal examination may have cancer: a sign of prostate cancer Rectal examination has cancer, it is too late. It is recommended that men over 50 years of age add a PSA examination to their physical examination.