I am not aware of any diet that has been proven successful in the treatment of TN.
An anti-inflammatory diet could possibly be helpful when considering the condition as a disease that causes high inflammation, however.
In that case, sugar is to be avoided, since it raises the inflammation levels in the body.
For other recommendations see the following:
https://www.pubfacts.com/detail/28524125/Surgical-management-of-venous-compression-causing-trigeminal-neuralgia
The effectiveness of an anti-inflammatory diet in the treatment of TN is yet to be proven.
People with TN often have difficulties chewing food, as they have highly sensitive teeth.
Therefore, it is recommended TNers eat soft foods.
Smoothies made with vegetables or fruit are a healthy alternative to ravioli or other soft foods!
Just try and maintain a healthy balanced diet whenever possible and do not be tempted to eat fast food.
If you are not able to cook for yourself, get someone else to do it for you or obtain your meals through a healthy food service such as Meals on Wheels (Australia).