This happens to me all the time but I can never think of many specific examples. One is Italian salad dressing. Sometimes I’ll get a burst of intense flavor, and suddenly the top/back of my head will itch like crazy. What’s going on, if anything?
Maybe Martian metabolisms can’t handle stuff like that? 
No real clue, actually. Could it be something like a reaction to one of the additives such as MSG? or an atypical migraine-like response? or some sort of sympathetic nervous system thing (nerve A, which handles taste, runs near nerve B which handles itch, and accidentally sends a signal to nerve B)?
I think I know the sensation the OP is referring to - mine tends to hit more right in the jawline than at the back of the head, but I’ve had both happen. I’ve never given it a heck of a lot of thought but I was always figured it was some sort of cramp squeezing out a nerve or something.
I don’t know if this is the same thing you describe, as it’s a tingly feeling rather than an itch, but certain very sweet foods (e.g. a Snickers bar) often make my scalp tingle.
Foods like pickled onions sometimes give me a tingle along under my jawbone, which I figure is the saliva glands squirting into action to neutralise the acid. In fact I often get that feeling in anticipation of eating such a food - e.g. when I’m just about to start on a bag of strong salt-and-vinegar crisps.
Actually it’s happening just thinking about it now!
Worcester(shire) sauce does this for me; my entire scalp seems to tighten - I think in my case the sensation is caused by the (few remaining)hairs on my head trying to stand on end, not unlike the sort of spine-tingle thing that you can get from eating very sour things.
Sounds like an unusual type of synesthesia, a condition where input into one of the five senses is experienced as if it were a different sense, allowing you to see sounds or, apparently, feel flavors.
Feeling flavors? That is weird. I should start keeping a log for whenever this happens.
For me (a synesthete) it is definitely not a synesthetic experience, it’s just some sort of weird physical response, and it usually only happens with the first bite or two of the food in question. You’ve never bitten into something tart and felt the classic puckering sensation?
A lot of people have intestinal yeast or candida.
Or even yeast on their skin or scalp.
Usually this yeast on the skin or scalp is invisible.
Sometime however it will present as dry skin or dandruff.
Or even oily skin. Like sebum.
If u have this yeast, when u eat sweets, u r actually feeding the yeast.
It kind of gets a sugar rush and tingles. Or may even feel itchy.
U can get the same feeling on your skin too.
Also anything that is fermented like pickles or wine or foods that r high in heart content likebreads, those foods too sort of give a boost or a wake up call to the existing yeast on ur body.
If u get these sensations it means your body is out of balance.
Get tested for candida of the gut.
Often people with immune issues have this.
Or people that drink a lot of booze.
People that have taken antibiotics more than 5 times can develop a chrnic yeast issue.
Some people r never bothered by it all after antibiotics.
If stomachs gets bloated easily after eating a meal, I mean like gassy bloat , u prob have intestinal yeast or food allergies.
U can develops food allergies at any time in your life.
I got allergic to all dairy products at the age of 23.
Had always been in perfect health too.
Now I’m 60 and an old hot mess. Lol.
This info is legit.
worst haiku ever
must learn better grammar please
zombie joke goes here
How these messages get revived after lying peacefully for more than a decade…
It’s a real…
(•_•)
( •_•)>⌐■-■
(⌐■_■)
headscratcher.
YEAAAAAHHHH!!
Never saw suicidal emoticon before. Props.
ETA: Wait–that’s an emoticon of a head scratcher? I thought it was you saying “terrible joke/pun coming up, I’ll shoot myself now.”
The polysemy of emoticonnantics.
The emoticon represents David Caruso in CSI: Miami, and his habit of putting on sunglasses to make a point. An example of this meme.
