The first manifestation of separation anxiety in babies is that they will show symptoms of anxiety, and babies tend to be more nervous and anxious, scared, crying, and not easily soothed. The second is the performance of the baby’s daily life, such as not being able to play alone, but must be accompanied by parents or other relatives; once parents or other family members leave the baby’s sight, the baby will be very nervous, afraid, shouting, and difficult to be calmed down; the baby’s diet and sleep will be disturbed, and the baby may appear to regress, such as having learned to control For example, babies who have learned to control their bowel movements may again lose stools and urine. In addition, babies may have nightmares and night terrors.