Do you actually need to see an allergist?

Hello! New to the FPIES scene. Likely oats and after tonight, maybe a new trigger. Anyways, is it really necessary to see an allergist for FPIES? Based on what I’ve read here, most are told to avoid the trigger until LO is older. As far as I understand, FPIES isn’t deadly as long as baby doesn’t get dehydrated so is it really necessary to see an allergist?

edited for spelling