Yep, "they" diagnosed it as "burning tongue syndrome." Can't even eat mild salsa. Even black pepper burns my tongue. Said nerve endings were damaged. Just another mysterious MS side effect.

Yes that has happened to me it was a infection

You just described me. Ms sucks!

Yes, Years ago, I had the same thing happen to Me.

I hope this helps my mouth and face goes from numb to pulsing pain all day and night I can not taste.
MSF 27 MS and Trigeminal neuralgia (TN)
What Causes Trigeminal Neuralgia?
The pain associated with trigeminal neuralgia represents an irritation of the nerve. The cause of the pain usually is due to contact between a healthy artery or vein and the trigeminal nerve at the base of the brain. This places pressure on the nerve as it enters the brain and causes the nerve to misfire.
Other causes of trigeminal neuralgia include pressure of a tumor on the nerve or multiple sclerosis, which damages the myelin sheaths that insulate and help conduct electrical impulses across nerve cells. Development of trigeminal neuralgia in a young adult suggests the possibility of multiple sclerosis.
Secondary Symptomatic Trigeminal Neuralgia (STN): Pain resulting from multiple sclerosis.
The pain is often described as an excruciating sensation, similar to an electric shock. The attacks can be so severe that you are unable to do anything during them, and the pain can sometimes bring you to your knees.
Trigeminal neuralgia usually only affects one side of your face. In rare cases it can affect both sides, although not at the same time. The pain can be in the teeth, the lower jaw, upper jaw, cheek and, less commonly, in the forehead or the eye.
You may feel aware of an impending attack of pain, though these usually come unexpectedly.
After the main, severe pain has subsided, you may experience a slight ache or burning feeling. There may also be a constant throbbing, aching or burning sensation between attacks.
You may have episodes of pain lasting regularly for days, weeks or months at a time. It is possible for the pain to then disappear completely and not recur for several months or years (a period known as “remission”). However, in severe cases, attacks may occur hundreds of times a day, and there may be no periods of remission.