I developed nerve damage in my feet as a result of my high immunity kicking in to protect my feet from the foot operation I had to remove a neuroma. My immune system went in to protect my feet but instead attacked the nerves in my feet. Hence the serious damage. Fortunately it can be reversed. Doesn’t happen often apparently. USA has far more advanced methods of working out what nerve damage has occurred than where I live so it was in the USA that type of damage was assessed and then treatment could be started. I’m very fortunate.