I think this is a misunderstanding of what we are talking about when we discuss scientific evidence in medical settings.
There are of course all sorts of belief systems in the wider world, and all sorts of things people choose to do and to pay for because of personal belief or preference or circumstances that have no scientific basis, and that's fine when no one is claiming to be basing their religious or personal belief or behaviour, or marketing their product or service, on scientific evidence.
As far as I'm concerned, modern western medicine claims to be built on the best available scientific evidence of what is most effective for the most patients. That is the basis on which it is funded by governments and/or covered by insurance or paid for by patients. We have a contract with them to do their best for us in terms of our health and well-being on the basis of the best available evidence.
If I go to a clinician for help with a particular medical problem, I expect them to use their knowledge and training to not only do what they were taught in their initial training, some of which will be outdated and unevidenced, but to have done their best to keep up with recent research in their field, and to be able to tell me the strength of the evidence for each option if there are several possible courses of action. So they may say, we usually do xxx but there's a new treatment yyy that has been shown to be more effective in clinical trials, but is still only effective in zzz% of patients.
What I don't want them to do, as some have done with me, is say, I've heard of this new treatment, why don't you try it. I wasted £240 on 3 sessions about 20 years ago of an expensive quack therapy for ME/CFS that just left me feeling conned, foolish and a failure. That doctor had no business recommending that therapy. He had no evidence on which to base that recommendation.
The same thing is happening today with people with Covid and Long Covid, with all sorts of unevidenced drugs and quackery being sold to desperate people. I don't criticise the patients - I understand desperation - I've been there myself. I criticise clinicians who play along with this, prescribing the unevidenced and potentially harmful treatments, and quacks who use the vulnerability of desperate people to make money. Sure some will get lucky and recover, but some would have recovered anyway, and by collecting anecdotal evidence on social media, as some are doing, more may be harmed.
The contract clinicians have with patients is to base their treatment on scientific evidence, and, if there is none, to say so. In many cases there is no effective cure or treatment, and treatments can only slow down decline, or provide symptomatic relief. That needs to be evidence based too. Since most medications, physical procedures and psychological therapies have negative side effects for at least some patients, it's important that's researched too. And treatments cost a lot of money, so that has to be factored in as well. If there is no effective treatment for a patient's disease, that needs to be said honestly, and the clinician's role then becomes one of providing support, and ensuring the person gets appropriate care.
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It's not about having to prove a model of the world in order to be allowed to criticise unevidenced treatments, it's about the basis on which clinicians claim to be working, and on which they are funded and let loose on the public.
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As to hypnotherapy in particular, I can see that some clinicians may find it a convenient quick way of helping a patient to relax in a session so they can get on with discussing with the patient how to go forward with dealing with their medical problem. If it is explained as just a shortcut to the type of relaxation you could equally get from going for a walk in a park, or listening to your favourite music, or whatever that patient finds relaxing, that seems OK to me. It's when it's presented as a treatment that can be effective in changing behaviour such as smoking, and is advertised and sold to people as more effective in changing that behaviour than other treatments, then it becomes problematic because scientific claims are made that need to be based on sound scientific research evidence where it is compared in clinical trials with other treatments.
I like your approach. Yes, it seems that the discussion has veered a bit to the side. That's what moderators are for
Okay, about medical applications.
I have never heard of hypnosis being used to treat illnesses unrelated to psychology or psychiatry. That is, I am not aware of any hypnosis treatment for diseases that are organic in nature (like inflammations or organ dysfunction) or invasive (like viruses and bacteria).
However, I have heard a lot about the use of hypnosis in psychology and psychiatry, as well as for amateur, cognitive and relaxation purposes, as I do. I've also seen a video on YouTube of a psychiatrist representing a mental health clinic who talked about hypnosis, that it works for some people and not for others.
I also heard about the difficulty of diagnosis in the area of psychological disorders and illnesses. That is, while the viral infection department will diagnose fairly quickly and accurately based on tests of a person's tissues and secretions, the psychiatric department is quite difficult to diagnose. I have heard that it can take years.
I have also seen somewhere a table of psychological disorders, which are divided into superficial, borderline, and profound. This is a figurative classification, I don't claim to be accurate, I just want to convey the essence. Deep disorders include complex ones such as schizophrenia, borderline ones are manic-depressive, major depression, and anxiety disorder. Superficial - mild depression, mild anxiety, maybe hypochondria (not sure).
And the whole highlight of this classification is that an extremely small percentage of mental disorders have an organic nature, related to the work of the nervous system at the level of cells, intracellular processes, inter-membrane processes without interference from the outside, i.e. the person is born that way.
Yes, if it is smoking, there is an inhibitory substitution of acetylcholine by nicotine. But it's an external exposure to a mild drug. And it's pretty hard to wean yourself off of it, which is true. I saw a chart somewhere that lists nicotine as one of the fastest addictive drugs. But it is possible to get rid of this habit even without the use of drugs, just on willpower, on changing your beliefs and working through the original reasons for smoking. This is exactly where hypnosis helps - to change beliefs. And it is the visualized experience that changes beliefs, which replaces the real one, as I have already mentioned in this thread. And it works, because I've already talked about the basketball-throwing experiment. Yes, the result is unreliable in terms of the exact sciences, but the result is in terms of the inexact sciences. That is, there is a percentage of people who can do it.
Back to mental disorders and treatment. If it is inorganic, it has to do with formed neural connections, which in a person's personality have the form of beliefs (one theory). What drug can be used to change the connection between neurons? That is, to sever one and create another. You have to find that connection first, and then change it. How do you find it? I believe that modern exact science has no answer to this question. I have not heard of it. If anyone knows, give me a link to the research. But it has to be fixed, because people are suffering from it.
So why not entrust the creation of new beliefs to the human body. Humans can visualize and create new connections in the brain themselves. Yes, this requires a strong prefrontal cortex. Many people settle for just the limbic system (joke

).
Yes, this is a theory, but there are also brain encephalogram studies that show the arousal of certain parts of the brain during meditation. That is, if a person meditates on some movement, then the cortical areas responsible for movement are excited. If he visualizes sounds, then the auditory areas are excited. If he visualizes visual images, then the visual areas are activated. And at the same time, there are actually no sounds, images, or movement around him. It is only his representation.
What does hypnosis do? Essentially, hypnosis, like meditation, puts a person in a trance state in which the frequency of brainwave activity becomes equal to the alpha frequency. At this frequency, one is neither awake nor asleep; one is immersed in oneself. In this state one can see conscious pictures and work with them. It's like a real experience, but it's a virtual experience. And it works for some people, as I said above. But in a virtual experience, neural connections are just as formed as in a real experience! (Basketball experiment).
So back to medicine. Yes, exact science has no evidence for the effectiveness of hypnosis. But inaccurate science has such evidence. But they are: Some people have had it work. And no more than that.
Imagine a situation. A person comes to a psychologist or psychiatrist with a complaint of some kind of disorder. The doctor cannot determine the cause on the basis of blood tests, etc. He does not see any organic reasons for this condition at all. So he has three choices: either symptomatic medication, psychotherapy, or a combination of the two. And the patient has a choice: either to destroy his internal organs or try something else.
I would like to hear the name of at least one drug in psychiatry that does not affect internal organs. Tell me the name, please. Hell, if it were real, everyone would be perfectly healthy!
And at the same time, the basic principle of medicine is do no harm.
Now, if there is even a small chance that anyone has been able to use hypnosis to correct their inner state and change beliefs, I would choose to pay money for hypnosis before paying with my internal organs for medication treatment.
Well, if anyone here has spare kidneys and liver to replace them after medication treatment, then you can choose medication therapy without even trying something safer, even if it is safe completely unproven by the methods of exact science! But it worked on someone once.
And I will thank that doctor who will first offer me hypnosis and soulful conversations, because he took care of my organic health, my organs. And you know, maybe that person didn't even have a problem?

Maybe he made something up for himself... Or maybe he wasn't, maybe he was really worried about his life. But what will the pills do? They will only relieve the symptoms, make the person more relaxed. To hell with that kind of treatment

!
Treating the symptoms is nothing. It is necessary to eliminate the cause, and the cause of psychological disorders often lies not in the organic damage, but in the quality and quantity of beliefs. It is much easier to teach a person to stay calm, even if rockets are exploding around him, than to constantly give him drugs for anxiety and fear. I know this from experience. I practice FREE anxiety hypnosis from time to time (maybe once a month). It always helps me. And my kidneys are intact, and my liver!
And anyway, it's better to pay with money than organs! I've even heard this saying: thank you, Lord, for taking ONLY money 