Hypnotherapy is a said to be a form of alternative medicine. It creates a state of focussed attention and increases suggestibility during which issues can be addressed. It is advisable to only go to qualified and experienced professionals for hypnotherapy sessions.
I use relaxation and guided imagery during hypnotherapy, and then work on positive messages that have been agreed with the client in advance. I find it particularly useful for reducing stress and it can also help with many other issues such as overeating, smoking, low self-esteem, recovery from past trauma and even pain management.