1. Reasons why babies are frightened There are many reasons why babies are frightened, such as sudden noises, strangers, accidents, etc. Because babies\’ nerves are not fully developed, they are often more sensitive to external stimuli and easily frightened. 2. Behavior of babies being frightened When babies are frightened, they will show different reactions. Some babies will cry incessantly, and even develop symptoms such as shortness of breath and pale complexion; some will become unusually quiet or even lose consciousness. 3. How to deal with treasure