In my case it is definitly from food allergies .
When it began, certain things caused pain in the ears.
Not only did I have ringing, roaring and humming in the ears but multiple body discomforts.
On days that I wasn't reacting to something that I ate the ears/head was fairly quiet.
Today there is only a slight ringing, but I still can't hear.
It seems to have permanently damaged my hearing.
Looks like I will be heading to the hearing aid store.