I useed to have this. It's very cureable. I'd say you best bet is to learn self hypnosis... Go and see a hypno therapist and get him to teach you or try this software, great stuff...
Neuro-Programmer 2 Home - Self-Programming with Brainwave optimization and Psychological techniques (Hypnosis, NLP, etc)
There's a free trial on it, do yourself a favor and check it out....