Baby easily get startled

There is 1 uncle asking Mommy how to know whether a baby got startled. 1 old grandmother tale is if the stools of the baby are greenish in color, he/she is startled. However, PD also mentioned before babies stools can be green color, depending on the type of formula milk drank. Thus this old tale seems not definte. Another way to verify is: if baby suddenly woke up in the middle of the night, crying very pitifully due to having nightmares, most likely is been startled by some sudden noise / strangers during the day but it could be because of playing too much in the day too. Thus there is no way to correctly determine whether a baby is startled. Only solution is to let the baby eat abit (using last fingertip to feed) of “Jing Feng San” (twice a day) then monitor whether is there improvement. People also say can eat “Zhen Zhu powder”(pearl powder). Other methods out there are looking for a medium (Taoism) or monk (Buddhist) for “help” to "cure"…Thus all depends on individuals whether to choose which method. However, Mommy strongly emphasizing that irregardless what method, 1st step must seek medical consultation then following by other own preferred methods. As for taking "Jing Feng San", must leave a gap of at least 4hrs in between this chinese medicine & western medicine.