Over the years I have lost my sense of smell 2 times. it came back both times. No I have a strange scenario: When I sneeze or blow my nose, everything tastes sour. It is as if something changed in my bain.
It then affects my lower intestine, and I get a small dull feeling in my head?
It has been happening more and more frequently. Not acid reflux. Food does not come up

Is this neurological? Any ideas?

Thanks in advance

Sherry