There are several successful methods to overcome Phobias and Fears. Usually what has occurred in such instances, is that the brain has learned in one instant that something is a danger and has created an over-reaction to that trigger.
In cases where a single traumatic event resulted in a phobia then EMDR (Eye Movement Desensitisation and Reprocessing) is very effective in resolving the problem.
In cases where the cause is less clear, Hypnotherapy methods are very effective to overcome the fears involved.
Thankfully the brain can re-learn the appropriate response to a situation. Using hypnosis this process can be swift and long lasting.