I too have experienced this, followed by whole body breakdown, I haven't been fully assessed yet but so far I agree with the above poster. I too developed muscle wasting and seriously bad memory. They say fibro I say no. I have found out I have a parasite and I think it's the culprit.
Hi I am 32 years old and have had this popping sensation in my head along with the pressure for two years this was my first symptom. I now have muscle wasting and memory problems. From what I have researched this type of pressure or popping are sometimes the first symptom of a neurological condition. I have talked to people who have ms and motor neuron disease who experience this sensation. I have found dr's are not very knowledgeable about this type of headache. at first I was even put through sinus surgery which did not help the problem. I hope you find your answers.
I am really disappointed not to have received a reply by now and was hoping for some advice on what could be wrong. I guess i will search the internet for some answers.