A person on Quora asked this most helpful question. Here is how I answered it:
I love this question because I had an anesthesiologist (an MD whose career is that of putting people to sleep for surgical procedures) came to me at the age of 61 after having all of the physiological conditions ruled out including sleep studies of him. At that point he realized that this had to be something in his subconscious mind so employed me to help him get rid of the problem.
The source of the problem after doing regression to cause – meaning I regressed him back in time to all the times his sleep was interrupted, was that of having his sleep interrupted so many evenings during his 3 residencies of which anesthesia was the last. His subconscious mind kept him waking up because it had been trained to do so every time he was called into work during his sleep time.
I cleared all the events that his subconscious mind brought up in one 2 1/2 hour session. He came up for a follow-up the next week stating that he had slept through the night 6 of the seven nights and requested a reinforcement recording in case he needed it.
I had another client whose wife called me because he was waking her up every night to sleep eat (he was totally unaware that this is what he was doing as he was asleep during the evening eating escapades. I regressed him back to find out why he was sleep eating to find out that sadly 25 years previously he had lost a niece and a nephew in a freak accident and he was filling the ‘hole in his soul’ with food at night. We cleared that out and then I had him have a conversation with the kids while in trance, and though they did not respond to him during the process, he never sleep ate again as proven with the wife letting me know that this was the case. Again, it was one 2 1/2 hour session to heal his problem of ‘survivor’s guilt.’ I have no idea why it came up so late after the fact, however, it did and needed to be cleaned up.
So, the bottom line is that there are many reasons that the subconscious mind wakes people up in the middle of the night and our job as hypnotists is to help the client enter their subconscious mind (really the amygdala and hippocampus of the brain as we have learned with brain scans) to help them access that material and help them to heal using the various techniques that we have to allow the healing to occur.
Many thanks for a fascinating question to answer for those who may be dealing with a similar problem and still have no idea in how to find relief.