Hi,
I am Dr.Bruno. I have read your question with care and understand your concerns. Let me try to help you starting to tell the basics
1. Brain is surrounded by a Fluid Called Cerebro Spinal Fluid. This Fluid also surrounds the
Spinal Cord 2. So Any Change in Pressure inside the skull is reflected around the spinal cord also
3. When We
cough or sneeze, the pressure within our abdomen raises
4. Because of this increased pressure within the abdomen, the pressure within the veins also raises
5. Hence the pressure within skull also rises
5. This rise is transmitted to the Spinal Cord via the Fluid
So
When you sneeze or cough, you get a pain in your back since you have a
cyst there
Hope you found the answer helpful.
If you need any clarification / have doubts / have additional questions / have follow up questions, then please do not hesitate in asking again. I will be happy to answer your questions.
Let me know if I can assist you further.
Take care.