The thickness of the cervix is normally around 3cm. If more than 3cm belongs to cervical hypertrophy. Generally chronic cervicitis, cervical erosion, cervical surface healing, glandular blockage, healing cervical volume increases, thickness increases, often accompanied by lumbar discomfort, vaginal discharge increases and other uncomfortable symptoms. In late pregnancy ultrasound check the thickness of the cervix, if thinning and shortening, there is a risk of preterm labor. It is necessary to pay attention to rest, avoid exertion and less activity to avoid inducing uterine contractions. The cervix is part of the uterus and can secrete glands. If erosion occurs, it cannot be distinguished from cervical cancer with the naked eye and can be excluded by cervical TCT and HPV screening. Usually pay attention to perineal hygiene, wear cotton breathable underwear, pay attention to vaginal secretion.