Health certificate anal examination refers to anal sampling for intestinal pathogenic bacteria culture.
The examinee pulls down his pants, presses his knees with his hands to expose his anus, and the staff goes deep into the anus and rectum with a special anal probe (or cotton swab), and then takes feces to cultivate intestinal bacteria.
Clinically, anal examination is a way for doctors to examine patients' intestines and rectum. Gynecology is often used to check the gynecological diseases of virgins, the degree of uterine opening during childbirth and the abdominal tumors of women in obstetrics.