Common symptoms of infants being frightened include crying, trembling, poor sleep, poor mental state, and loss of appetite and refusal of breastfeeding. Due to the imperfect neural development of the brain and limited cognition of the external world, infants may show symptoms such as crying when frightened, and some infants may show symptoms such as stretching their arms forward, spreading their fingers, and trembling all over their body. At the same time, infants may not sleep soundly at night, wake up frequently, and may even have poor mental state, loss of appetite, and refusal of breastfeeding. After the infant is frightened, parents should accompany the infant as much as possible and try not to let the infant sleep alone in a room. Try to create a quiet and comfortable environment for the baby, and usually the baby can recover from the shock on its own. If you suspect that your baby is frightened and the symptoms do not get better, it is recommended that you take your baby to the hospital in time for reasonable treatment under the guidance of the doctor.