Hard pressure feeling in my neck and head
I started practicing spiritual practices, then visited Vipasana, after the course, I worked a lot with the body. I was able to go quite deep in this direction and experienced a lot of new states (leaving the body, awareness, self-healing, etc.). There was very clear progress in cleansing, but after about a year I started to have a feeling of pressure in the back of my head, which can travel up my head (mostly along the bones of my skull) and neck. This sensation at first was only during practices, but then it started to be felt constantly and outside of practices and was quite strong. I have been trying to do something about it for 3 years now, but nothing works, although it is not different from hundreds of similar ones that were dissolved during the practices. Now this "block" hinders me a lot not only in practice but also in everyday life and I am looking for a way out of this situation.
Long description:
About 4 years ago I took a course of Vipassana, after which I got a huge surge of sensitivity in the body down to every organ, tooth from inside, skin under my little finger, insides of bones, etc. In addition, there were all kinds of special effects in the form of a sensation of flow through the body. This flow went through some obstacles, some of which simply dissolved because of this flow. There were times when this flow accelerated so much that I became it myself.
When I returned home I actively continued to practice (a couple of hours in the morning and evening) and although the sensuality of the body began to fall slowly, new sensations appeared which were not there before, for example, smells when concentrating on some densities (usually not very pleasant). At first, there were cramps, but after some time of concentration, they went away bringing powerful relief and inflow of energy. My sleep time was reduced to five hours, and sometimes I lost track of how much sleep I was getting, but this had no negative effect on my well-being at all. For some reason, I was sure that I was moving in the right direction and felt the changes and restructuring of my physical and energetic bodies. Once I just could not believe it when I went swimming in the sea for the first time after my righteousness and found out that I swam radically differently than before. Before that, I could swim 30 meters at the most because I felt pressure in my chest, which made me gasp for breath. Now I can swim more than a kilometer exactly. I also noticed that deep relaxation can dramatically change the feeling of cold.
Then the practices started to go beyond sitting and happened when just lying down, driving, or reading a book. Several times when I was sick, I would concentrate on the problem, and by the second day it was gone.
Then I started having spontaneous exits from my body before falling asleep. At first, I began to hear a wild low-frequency hum, but I did not understand what it was and I was afraid to suppress it, after which it was very unpleasant. But then I got tired of it and let it go, saying "whatever happens". 90% of the time I ended up in the same room and it was hard to move because of the viscosity. One time I was clearly in some other room. Then I learned to make such exits by intention, but I just didn't understand what I was doing there.
Then I started to spontaneously enter a state of awareness when all thoughts stopped and I contemplated everything at once. Usually, it happened if I just stared at something, or when reading. Visually everything became very clear as if I had switched on the super 3D mode. All sounds and touches also became special. This state lasted up to several hours. Then I also learned to enter it by intention.
Changes happened not only inside, but also outside. I became much calmer, a lot of things were rethought and even my past attitude to various things seemed strange. I continued practicing and found new and new "lumps" in the body, but their "complexity" began to increase. If at first, it took 2-10 minutes to dissolve the density, then it grew into hours, days, and even months. I remember the pain in my shoulder blades did not last for 3 months. 3 months (purely during meditation sessions), but when it dissolved I almost felt light.
But at one point I noticed a very strong viscosity at the back of my head and at the top of my head and for about 3 years now I can't do anything with any relaxation, concentration, or breathing. Outwardly it is no different than a lot of the blocks I went through previously. It can still change, walking around the skull, or disappear altogether for a while. Sometimes during the practice, there is a feeling that it is about to dissolve, but as a rule the next day it is there again and not a little less.
Now this feeling is so intense that I feel it almost constantly even without entering the trance and it interferes with my life, especially mentally working on something, even reading something. I have tried several physiotherapists and an osteopath, but it has not changed anything. During meditations, which last up to an hour, I feel my body more like a cloud and can still go to any part of the body with my attention, but the sensations have changed cardinally usually I feel a slight warmth or vibration where I concentrate. Also, my intuition just screams to me: there is no point in directing attention to the physical body anymore. Besides, I can't find anything there anymore.
I read Robert's books a long time ago and was surprised that I was familiar with a lot of things there and that somehow I was also on a similar path of channel cleansing. I feel that my progress has stopped, because whatever I try - this density just pulls my attention to itself. It especially exhausts me when I'm tired from work or whatever. It helps to go into a trance for 10-20 minutes in the middle of the day (when my body feels like it's going into a dream with rhythmic deep breathing) and then it gets easier. I really want to find a way out of this situation to continue my path and live a full life. I will be very grateful for any help in solving my problem.
(sorry for the translation errors)

I think you activated Kundalini, and it is this that is causing the pressure problems. I suggest you read my book 'Energy Work' for advice on this. What you have is 'essestially'an energy blokage. I reccomend electrical grounding. You can go camping or get some grounding products, like bedsheets, grounding pads, etc. These things will likely help over time.
robert