Spinal Fluid Pressure

Dear all,
I’m posting this as I know that I can find a lot of knowledgeable folks here.
I’m currently after my 4th ketamine infusion.
After the 2nd I have noticed some symptom that I have described as a restless legs. I don’t think that I was correct. After researching it, I have discovered the this symptom has to do with a spinal fluid pressure. One article described it as a brain wash. I think that’s exactly what it is. Any input on this? Thanks in advance!