They have a sharp distinctive feature in sensations. Such a manifestation during pregnancy indicates a possible threat of termination of a normally ongoing pregnancy. Nagging pain can be accompanied by bloody discharge from the genital tract that is scarlet in color - the color of fresh blood, or brown or dirty red. Scarlet discharge indicates the beginning of placental abruption. The brown color indicates that placental abruption in some area has already occurred earlier, but, with the contraction of the uterus, the cavity was emptied and the contents came out.