Vaginal bleeding is a symptom of natural miscarriage, and this is known as lochia. Lochia is the discharge from the vagina after childbirth, typically ceasing about a week postpartum. After a natural miscarriage, normal bleeding lochia generally has a bloody smell but does not have any other odorous scents. Following a natural miscarriage, it is important to monitor the expulsion of lochia, paying attention to its amount, color, and odor changes, as these factors can reflect the recovery of the uterus. Normally, the lochia will clear up around a week, and it should not last longer than two weeks at most. If lochia persists for an extended period after the miscarriage and is accompanied by abdominal discomfort, a hospital visit is necessary for a follow-up to check the condition of the uterus.