Just wanted to pass on what I have learnt in case it may help someone else.
For the last 9 months I have suffered from increasingly bad internal vibrations, like I had many cell phones vibrating inside my body. It started in my chest (but my pulse was completely normal) and then got worse and worse. It got to the stage where if I moved (especially my head) it felt like my brain was shaking or echoing around my skull. It was very scary and unpleasant. My hands would shake, I had a lot of pain and weakness in my arms, shoulders and hands and a loss of co-ordination in my hands and fingers. I spent a lot of money seeing several different GP's, saw two different chiropractors ( I have compaction in my spine so at first I thought it was that), went to a neurologist, an endocrinologist, an iridologist, had my blood analysed, had a brain MRI, was put on a lot of different meds including anxiety meds and NOTHING worked. The docs looked at me like I was a nutcase and no one had any answers. I eventually found a blog which said that an excess build up of lymph can cause internal vibrations. I cut out salt, all processed food, most alcohol and meat and started dry brushing, massage with essential oils for lymph drainage, baths with Epsom salts and essential oils and started stretching and exercising more and doing positive affirmations. The result so far is that the vibrations have almost completely stopped, the pain is gone and I am feeling hopeful for the first time in a long time. I know this is not an answer for everyone but if you are going through this and you are feeling terrified as I was, please research lymph drainage and give it a try. I read somewhere that 80% of folks have got poor lymph drainage because of bad diet, sedentary lifestyle or whatever. We all know about cholesterol and cancer but no one ever talks about lymph health. I hope this helps anyone who is suffering from this.