Hello, My brother was drinking water from glass. He felt something on his tongue, turn out it was broken a glass piece(around 1-2mm). So he has doubt that he might have swollen a similar tiny piece of glass. He's not sure. But incase it happened, what precautions do we need to take. He had his meal after that. It's been more than a hour after this incident. So far he's not feeling any kind of irritation or stomach ache. What should we do? Thanks