Cervical cancer still ranks first among gynecological malignancies, according to the World Health Organization, it is estimated that there are 459,000 new cases of cervical cancer in the world every year in the 1980s, and 131,500 in China. What are the causes of cervical cancer? 1. Generally speaking, the germs infected by sexual intercourse are the most important cause of cervical cancer, the most common one is hpv virus. In addition, the possibility of herpes simplex (hsv) and vaginal trichomonas causing cytopathy is also high. Basically, cervical cancer is a cancer caused by sexual contact infection. In fact, Trichomonas vaginalis is widely present in the population and because it has few symptoms, it is not easily detectable and almost asymptomatic. 2. Immune system lesions: Changes in the body’s immune system have been considered as an independent factor in the cause of cancer, because the chances of the body contracting viruses are elevated when the immune system is faulty. According to the report, the rate of cervical cancer and pre-cancer is about ten times higher than that of the general population in patients who use immunosuppressive drugs. 3.Stimulation of foreskin scale: The foreskin of one’s spouse or partner of a sexual promiscuous person contains foreskin scale, and the cholesterol in foreskin scale is transformed into carcinogenic substances by the action of bacteria, which can not only produce penile cancer in men, but also stimulate cervical cancer in women. Experiments have proved this point. Even if there is no prepuce, prepuce is a chronic stimulating cancer-causing factor for female cervical cancer. 4.Excessive estrogen and abnormal metabolism is also one of the causes of cervical cancer. The cholesterol in the foreskin is transformed into carcinogenic substances by the action of bacteria, which can not only produce penile cancer in men, but also stimulate cervical cancer in women.