Anything. Name a human emotional or even physical condition and chances are that someone somewhere has used hypnosis to alleviate or change it. Stress, the effects of trauma, both physical and emotional pain such as in childbirth, motivation, memory, breast and penis enlargement, health control and even time travel in the form of past life regression - are just a few that spring to mind. Even if hypnosis can't totally eradicate something it can and does go a long way in changing attitude and perception so that the bodies healing process can act with less interruption
Hypnotherapy describes, at least it should, hypnosis being used to dislodge ills. This constricts people using the title to look at just about everything as illness. I prefer the term hypnotist as this has no such limitations. More and more however hypnotherapy describes psychotherapy and psycho-analysis that sometimes doesn't even use hypnosis but the prefix looks good on the letterhead. Such therapists tend to use guided relaxation and visualisation of one sort or another, which often works perfectly well, but doesn't always lead to real hypnosis. These 'relaxation' techniques are not as rapid nor as intense an experience and people have often reported their disillusion that nothing really happened.