There are many different causes and reasons for people to exhibit fear and or anxiety.OCD for example is an anxiety "disorder".People on Autism spectrum deal with more than one type of anxiety often.Traumatic events can lead to ongoing fear.

It's always best to talk with a professional if you deal with long term anxiety symptoms.

Having said that there are many self-help methods for dealing with our anxiety. That's apart from things like CBT (or even medications). Although Cognitive Behaviour Therapy is very helpful to re-learn patterns of behaviour, when we've dealt with anxiety for a very long time, it can be difficult learning healthier coping mechanisms. However, it can be done.

Some of these self-help ideas may be useful for you, but some may not. You probably already know about all these ideas I've mentioned, plus it's different for every individual.

Self-Help for Anxiety: 7 Ways to Calm Anxiety at Home