Children that experienced many stressful events during their childhood have a bigger chance of getting anxiety-related complaints.
Strangely enough, children that experienced hardly any stress also have a bigger chance of getting these complaints. It is best to experience some stress every now and then so that you can practise by doing things that may be a bit stressful or exciting for you (like going on a roller coaster) but do not frighten you (too) much.
Did you know that people who suffer from Hippopotomonstrosesquippedaliophobia are afraid of long words.