Green discharge during pregnancy usually indicates possible vaginitis, such as trichomoniasis or inflammation caused by bacterial colonization such as anaerobic bacteria. This is usually due to changes in hormone levels that affect the acid-base balance in the vagina, causing pathogenic bacteria to multiply and cause vaginal inflammation. The discharge is usually thin and purulent, yellowish-green, foamy and smelly. Some pregnant women may have different degrees of vulvar itching and a few may have burning sensation and may experience frequent urination, urinary urgency, painful urination, bloody urination, abdominal pain and diarrhea. Because of the special physiological period of pregnancy, the medication should be more rigorous and vaginal medication should be given under the guidance of a doctor. It is better to do a routine examination of secretions before medication to find out the type of pathogens causing the infection and then treat according to the type of pathogens. In addition to following the doctor’s instructions, the patient should also pay attention to keeping the vulva clean and hygienic, wash the vulva with water every day, change underwear regularly, use cotton loose underwear as much as possible, avoid bathing and sitz bathing, choose showering, and forbid sexual intercourse during the treatment period.