Hello and welcome to HCM,Stroke
is associated with permanent loss of function of part of brain that is affected.
The problem that your father is facing is that of burning sensation on reight side of the body.
This does not seem to be because of loss of function of the pain centre but in fact due to over activity of the pain center of the brain.
Neurological damage is difficult to manage.
However, division of the nerve/ nerve trunk supplying that area will help to relieve the pain.
You need to consult your neurologist
as well as a neurosurgeon for management of the problem.
Thanks and take care
Dr Shailja P Wahal