There is no such thing as “the easiest way to recover a frightened newborn”. There are mainly physiological reasons for newborns to be frightened and pathological reasons such as vitamin D deficiency. Physiological factors can use sleeping bags to improve the startle reflex; vitamin D deficiency requires vitamin D supplementation and other medications. 1. Physiological reasons: newborns due to the central nervous system development is incomplete, nerve conduction is easy to generalize, the “startle reflex”. This is the newborn baby looks like being frightened in general. Sleeping bags can be used to bandage the upper limbs with pressure to improve the startle reflex. 2. Pathological factors: neonatal vitamin D deficiency, neonatal hypoglycemia and so on can cause similar performance. Vitamin D deficiency requires vitamin D supplementation, and neonatal hypoglycemia requires the use of oral dextrose and infusion under the guidance of a doctor to maintain stable blood sugar. Frightened newborns may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease, and then give targeted treatment or treatment.