Natural miscarriage generally cleans up the lochia in about a week. This is because natural miscarriage refers to the process where the embryo flows out from the uterine cavity on its own. Most people can completely clear out after a natural miscarriage, so the amount of bleeding is generally not very much, and the bleeding duration is not very long. If it is not clean after a week, it is necessary to consider whether it has not been completely cleared, and it is best to go to the hospital for an ultrasound to see if there are any issues with the uterus. Additionally, it is essential to rest and reduce activities after a natural miscarriage.