Yellowish-green fluid after childbirth is mainly due to the possibility of vaginitis or cervicitis. A healthy woman’s leukorrhea should be milky white or colorless, but after childbirth, women’s bodies are still recovering and the leukorrhea may be different from normal. The main pathogen is Trichomonas vaginalis, a common vaginal inflammatory disease caused by Trichomonas vaginalis, which lives in a humid environment with a pH of 5.2-6.6. Most patients with trichomoniasis are often accompanied by bacterial vaginosis. The main symptoms are: 1) an increase in discharge, which is yellowish-green, thin and purulent, foamy, and smelly. 2) itching of the vulva, which may be accompanied by burning, pain, and painful intercourse. When the above situation occurs, it is important to go to the hospital in time to do the appropriate examination and make a clear diagnosis and then carry out symptomatic treatment. Treatment, mainly metronidazole or tinidazole is the most effective, but for women who are breastfeeding, use this drug to stop breastfeeding.