8 early signs of cancer proposed by the World Health Organization: 1. palpable hard nodes or hard changes, such as hard nodes found in the breast, skin and tongue; 2. significant changes in warts (superfluous tumors) or moles; 3. persistent abnormal digestion; 4. persistent hoarseness, dry cough and difficulty in swallowing; 5. abnormal heavy bleeding from menstruation, bleeding outside of menstruation; 6. unexplained bleeding from the nose, ears, bladder or intestines; 7. 7.Wounds that do not heal, swelling that does not go away; 8.Unexplained weight loss. The above “tumor signals” are not the basis for cancer diagnosis, but they may be the early signs of some cancers, so they should be taken seriously and go to hospital for examination in time to clearly diagnose the disease, so that early detection and early treatment can be possible, thus increasing the cure rate.