If you have dark-colored nightmare 18 days after delivery, you need to pay attention to whether there is an odor, and also to observe the size of the nightmare. If the dark-colored nightmare has an odor, it means that there is an inflammatory infection in the uterine cavity, so you should pay attention to the difference. If the residue in the uterine cavity is not large, treatment by taking motherwort granules or new biochemical granules can promote uterine contraction, activate blood circulation, dredge the meridians and promote the discharge of residual substances.