When a miscarriage occurs, whether a uterine cleaning is needed depends on whether there are any remnants in the uterine cavity as shown by a follow-up ultrasound examination, that is, to see if the miscarriage was complete. If the examination reveals significant remnants in the uterine cavity after the miscarriage, then a uterine cleaning treatment is required. Most women do not need a uterine cleaning after a natural miscarriage, as typically the bleeding will stop around 7-10 days post-miscarriage. Therefore, women should focus on resting, improving their nutrition, and enhancing their body's resistance to prevent any potential complications after a natural miscarriage.