If the first one is really afraid, the kidney qi is not solid, and the kidney is the main bone of yin, so it will urinate and the leg bones will tremble. Therefore, people with insufficient kidney qi are prone to fear.

Second, in addition, courage (not entirely referring to the courage of western medicine) is the main decision, so courage is weak, and people have no right to decide, which is also easy to produce fear, surprise and indecision.

Third, some people are born timid and have nothing to do with kidney and gallbladder.

Fourth, there are people who lack exercise or have been frightened in some way, but are easily frightened and have little to do with kidney and gallbladder.