There's no sign.
1, because when my mother is resting, some cerebral cortex has not completely rested, and there is still discharge activity, which makes the brain in an excited state, so there is a phenomenon of dreaming that her daughter was killed.
2. Dreaming is a normal physiological phenomenon. In sleep, it can be divided into fast wave sleep and slow wave sleep. Normal people dream every night, and most of the time they dream in deep sleep. Sometimes they can remember, and sometimes they can't.