Three months after the birth of the vagina and yellow discharge is not normal, this is considered to be cervicitis, uterine fibroids, as well as vaginal foreign body residues and other reasons. 1. Cervicitis: Cervicitis is mainly caused by Chlamydia trachomatis infection, Neisseria gonorrhoeae infection, hormonal imbalance, vaginal flora disorders and other reasons. Patients will have an increase in leukorrhea secretion, and the leukorrhea is light yellow or gray. If the yellow vaginal discharge three months after delivery is caused by cervicitis, it is mostly considered abnormal. 2.. Uterine fibroids: the etiology of uterine fibroids is not clear, and it is considered to be related to heredity, abnormal levels of sex hormones in the body, stem cell mutations and other factors. Patients will have leukorrhea increase. For uterine fibroids complicating infection so that the patient’s vagina appears yellow discharge three months after delivery, is also considered to be an abnormal performance. 3. Others: yellow vaginal discharge three months after delivery is not normal if it is caused by foreign body residue in vagina, vaginal cancer or cervical cancer complicating infection. Yellow vaginal discharge three months after delivery is generally not normal, and it is recommended that the patient needs to consult a doctor in time, and can follow the doctor’s instructions to choose the appropriate measures for treatment.