Why is it that I chew on my tongue? Sometimes I dont realize I am doing it but sometimes I just do it when I am mainly stressed? I bite my tongue sometimes not so bad but sometimes til I see sores, like if a dog bite me with or without jeans on. I also sometimes though not as often as the tongue chewing, chew my cheeks. I have been biting my tongue for as long as I can remember, just lately it has gotten worse.