“That study changed the whole landscape,” said Dave Patterson, a psychologist at the University of Washington in Seattle, who has been using hypnosis since the 1980s to help burn victims withstand the intense pain that comes with the necessary but excruciating bandage removal and wound cleaning. Since the ’90s, other well-designed, controlled studies have been published showing similar changes in brain activity. In another slightly trippy example, researchers suggested to people in a hypnotic state that the vibrant primary colors found in paintings by Piet Mondrian were actually shades of gray. “Brain-scan results of these participants showed altered activity in fusiform regions involved in color processing,” notes psychologist Christian Jarrett.
Hypnotherapy is a form of therapy used to reprogram the subconscious mind. When under hypnosis, you put your mind and body into a heightened state of learning, making you more susceptible to suggestions for self-improvement or behavior modification. The goal is to put the subconscious and conscious mind in harmony, which in turn helps give you greater control over your behavior and emotions.
Mesmer's technique appeared to be quite successful in the treatment of his patients, but he was the subject of scorn and ridicule from the medical profession. Because of all the controversy surrounding mesmerism, and because Mesmer's personality was quite eccentric, a commission was convened to investigate his techniques and procedures. A very distinguished panel of investigators included Benjamin Franklin, the French chemist Antoine-Laurent Lavoisier, and physician Jacques Guillotin. The commission acknowledged that patients did seem to obtain noticeable relief from their conditions, but the whole idea was dismissed as being medical quackery.
Charcot operated a clinic at the Pitié-Salpêtrière Hospital (thus, known as the "Paris School" or the "Salpêtrière School"), while Bernheim had a clinic in Nancy (known as the "Nancy School"). Charcot, who was influenced more by the Mesmerists, argued that hypnotism was an abnormal state of nervous functioning found only in certain hysterical women. He claimed that it manifested in a series of physical reactions that could be divided into distinct stages. Bernheim argued that anyone could be hypnotised, that it was an extension of normal psychological functioning, and that its effects were due to suggestion. After decades of debate, Bernheim's view dominated. Charcot's theory is now just a historical curiosity.[59]
My young son recently experienced the loss of a close relative close to him in age. He now has a severe phobia about dying. He's not eating well, he's also showing signs of depression and anxiety. Could I make things worse by trying hypnosis? He's only seven so I don't think it would be hard to try these techniques on him, but I want to make sure before attempting it that there's no way this could have a negative affect and make it worse. I tried to take him to talk to a physician but all she wanted to do was give him pills and that's not something I'm comfortable with without trying some other things first, like hypnosis for example. What are your thoughts, do you have any advise for me.

the induction of a specific altered state (trance) for memory retrieval, relaxation, or suggestion. Hypnotherapy is often used to alter habits (e.g., smoking, obesity), treat biological mechanisms such as hypertension or cardiac arrhythmias, deal with the symptoms of a disease, alter an individual's reaction to disease, and affect an illness and its course through the body.
In the 1950s, Milton H. Erickson developed a radically different approach to hypnotism, which has subsequently become known as "Ericksonian hypnotherapy" or "Neo-Ericksonian hypnotherapy." Erickson made use of an informal conversational approach with many clients and complex language patterns, and therapeutic strategies. This divergence from tradition led some of his colleagues, including Andre Weitzenhoffer, to dispute whether Erickson was right to label his approach "hypnosis" at all.[10]