Hypnosis is a bit of everything, but very much up to yourself to believe it's working. If you have no faith in the results, it's not for sure it'll make any difference.
Be careful though, because hypnosis is nothing to play around with. It can be dangerous if the hypnosist for one or another reason isn't sure what he or she is doing.

Physical and emotional connection is nothing strange, and yes, physical pain can be intensified by strong emotions. Most people have had a hurting tummy from being nervous as an example.
Doctors today are a lot better in connecting physical and emotional symptoms than they used to be, but it's far from perfect.

C.