Spiders? Knees? Reflections? Does the mere mention of these things get you anxious? You might be suffering from a phobia.
But for some people, it goes beyond fear to irrational panic and crosses the line to affect their career, family and health.
One lady couldn't bear to interact with people, fearing neagtive sentiments and eventually collapsed from the stress on the eve of a talk she was meant to have given.
Psychiatrists talk about the patients' battle against crippling fear.