The startle reflex generally refers to the movement of infants and toddlers when they are startled by sound or when their bodies temporarily lose support, such as extending their arms outward, extending their legs, arching their backs, gathering their arms together for holding objects, and shaking their bodies. 1. Soothing and massage: When infants have a startle reflex, you can gently soothe and massage their bodies and limbs to give them a sense of security and comfort, thus restoring calm and relaxing their limbs; 2. Appropriate wrapping: When the above symptoms occur, you can check the tightness of the infant’s wrapping If the infant has a startle reflex, it is necessary to check whether the surrounding environment is too noisy or has sudden stimulation, and try to keep the surrounding environment quiet and reduce stimulation, the infant’s startle reflex will be gradually relieved. It is recommended to help infants and toddlers to do relaxation actions, such as taking off clothes before bathing, relaxing infants and toddlers’ limbs and letting them move freely, so as to promote the development of the nervous system through passive activities of infants and toddlers’ limbs. The startle reflex is a normal physiological reaction, and as babies and toddlers grow older and their nervous system develops, the startle reflex will gradually decrease or disappear altogether, so parents need not worry too much and can just soothe them in time.