rat makes grinding noise with his teeth

??? my rat makes grinding noises with his teeth and sometimes it's really loud and i read somewhere that it means he is getting ready to bite me or that he is like puring or something. and i was just wondering if you knew what it meant. thanks alot

he's not cold...umm he aint chewing his teeth down...but like what do the noises mean...cuz is he is grinding his teeth at me and it means he is gonna bite then i aint puttin my hand in the cage.you know what i mean. so can you tell me what the noises mean??? thanks alot.

It could be what you are saying it is or he/she could just be cold lol doubtful or he/she could be nawing chewing or whatever her or his teeth down.