Some people mentioned that they also had terrible
pain. I found something on the web while I was looking
for other info, about glossopharyngeal neuralgia.
It's a condition marked by repeated episodes of severe pain in the tongue, throat, ears and tonsils, which can last from a few seconds to a few minutes. It can be triggered by swallowing, chewing, laughing, speaking or coughing. These areas are connected with the 9th cranial nerve.
Just thought you might be interested.