Menstruation refers to menstruation, and menstruation with something like jelly inside may be normal endometrial shedding, pelvic inflammatory disease, cervicitis and so on. 1. Normal endometrial shedding: the process of menstruation is the process of endometrial shedding, in addition to blood, there are some endometrial fragments, cervical mucus and shedding of vaginal epithelial cells, endometrial fragments and mucus may also be manifested as something like jelly. 2. Pelvic inflammatory disease: Pelvic inflammatory disease is an infectious disease of the upper genital tract of women, inflammation stimulation will cause increased secretion, when menstruation, manifested as something like jelly. 3. cervicitis: cervicitis is an inflammation that occurs in the cervical region of the uterus, stimulated by local inflammation, the local cervical glands will be exuberant secretion, mainly secretion of secretions like jelly, and menstruation with the discharge. There may be other reasons for the jelly-like substance inside the menstrual period, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.