As the old saying goes, biting your tongue means you want to eat meat. However, the main reason for occasionally biting your tongue while eating is likely a lack of concentration, meaning it's a normal phenomenon. It could also be due to poor dental occlusion.
If you frequently bite your tongue, it may indicate a problem such as a stroke, for example, a small cerebral infarction or even a cerebral hemorrhage, a mass growing inside the skull, or a tumor that compresses the cranial nerves, preventing the tongue from moving flexibly and causing it to be bitten by the teeth during chewing.
It is recommended that people with the "three highs" (high blood pressure, high blood sugar, and high blood lipids) who experience this situation should go to the hospital for a related examination for cerebral infarction.
In addition to biting your tongue while eating, other details of life such as a slowed and prolonged swallowing action, frequent drooling, unconsciously dropping a teacup or rice bowl, or being unable to whistle can all be harbingers of a cerebral infarction.
Generally, when these premonitory signs appear, a CT scan is necessary. An electrocardiogram (ECG) should also be performed as a routine check to see if there is a myocardial infarction, arrhythmia, etc.