The pathological types of cervical cancer are usually divided into squamous carcinoma (invasive squamous cell carcinoma), adenocarcinoma, and other rare types, such as adenosquamous carcinoma and villous tubular carcinoma, etc. The most common type is squamous carcinoma, and the incidence of adenocarcinoma has been on the rise in recent years. There are four types of squamous carcinoma: exophytic, endophytic, ulcerative, and cervical canal type, the most common of which is exophytic. In the exophytic type, the cancer foci grow outward in a papillary or cauliflower shape and bleed easily when touched; in the endophytic and cervical types, the surface of the cervix may be smooth or only barrel-shaped; in the ulcerative type, there is often necrosis and infection, and the surface of the cervix is shaped like a crater.