Pregnant with super heavy odor down there is usually the odor from abnormal leucorrhea, which is a common manifestation of vaginitis. It is recommended to visit the obstetrics and gynecology department of a regular hospital, and according to the results of vaginal secretion examination, treatment should be carried out under the guidance of physicians. I. Common causes: 1. bacterial vaginitis: after pregnancy, due to changes in vaginal pH, microorganisms multiply and cause bacterial infections, which can be manifested as grayish white leucorrhea, thin in texture, with fishy odor; 2. mycotic vaginitis: pregnant women’s immunity decreases, which can easily cause fungal infections, manifested as beanbag-like leucorrhea with odor; 3. trichomoniasis: a disease caused by Trichomonas vaginalis infection, leucorrhea is thin purulent, grayish-yellow, foamy, and odorous. Treatment: After seeking medical attention, we need to improve the discharge test to make a clear diagnosis and provide appropriate treatment according to the nature and color of the discharge. Generally, the vulva can be washed with the appropriate lotion, or apply antibiotic suppositories for local use under the guidance of the doctor. Precautions: Because of the special physical condition during pregnancy, you should seek medical treatment in time when symptoms appear and do not use drugs blindly to avoid the adverse effects of drugs on pregnant women and fetuses. Pay attention to gentle movements when inserting vaginal pills to avoid improperly inducing contractions that may lead to miscarriage. Pay attention to the cleanliness of the perineum in daily life, change underwear regularly and avoid unclean sex. Regular work and rest, balanced nutrition, strengthen resistance. Regular maternity check-ups to keep track of the physical condition of the fetus and the pregnant woman.