I was wondering if anyone else has experienced a sensitivity to or an increased sensitivity to food preservatives/additives prior to or after their Dx?

For over 10 years I have had mild adverse effects to food additives/preservatives. The most common is store bought hummus (like Sabra) would leave my tongue feeling numb. Over the past year it has increased to ketchup and salad dressings (any foods that are more liquid or creamy). Earlier this year, just a month or so before I noticed any problems with my tongue I had a pretty strong reaction to some tartar sauce in which my entire throat, tongue, lips, and chin became numb and itchy. I mentioned this to my normal doctor and he laughed and told me not to eat it then.

I was just curious to see if anyone else has noticed an increase in sensitivity to certain foods.

Female, Age 38, healthy non-smoker, rarely drank, regularly workout
May 2014 noticed irritation on tongue
6/18 saw doctor
6/25 saw ENT specialist got biopsy
6/30 Dx HPV P16+ ve SCC tongue cancer
7/9 CT scans, no visible spread
8/20 partial glossectomy with radial forearm flap, neck dissection 26 nodes sampled - results T2 N0 with mild dysplasia
4/2015 start to have ear pain
5/2015 recurrence
6/4/2015 surgery 29 nodes samples pN 2c
7/13/2015 7 wks of Chemo & Radiation start