Fundal Gastritis means inflammation of fundal part of stomach.
Lax less means loose sphincters of lower esophageo-gastric junction.
These are part of same disease associated with increased acidity.
Next Steps
try to find if any stress like factors are there and should be avoided.
Health Tips
diet is very very important. avoid spicy foods coffee tea cold drinks etc. plant protein based diet is the best/ ideal diet.