There is no definite correlation between sour milky leukorrhea and pregnancy. Generally speaking, if there is no vulvar itching, discharge odor, vulvovaginal pain, this situation is not special treatment. You can pay attention to vulvar cleanliness and hygiene, prohibit spicy and stimulating food, change underwear frequently, etc., after the above treatment, most of them are significantly improved. If the symptoms do not improve after the above treatment, in this case, you need to go to the hospital for further examination of vaginal secretions. Depending on the vaginal secretion test, the next step of treatment will be decided. If it is trichomonas vaginitis, vaginal topical metronidazole suppositories, at the same time couples with the use of compound metronidazole Vitamin B6 tablets. If it is mycotic vaginitis vaginal topical medication dakin suppositories or mycotoxin suppositories.