<s>[INST] i have a biting and chewing problem and i have had it for along time.  is there a term for what i have? i bite and chew on pens, cans, bottles, straws, plastic spoons, my fingers and nails, my gum, and even grind my teeth together in my sleep.  i am 19, i am 57, 202 pounds. i have adhd and GERD. [/INST] Thanks for using Chat Doctor. Read your query. The biting on pens, bottles, straws, gums suggests the psychological conditions of yours. The stress in life and or anger is being tried to be overcome with these measures. I would suggest you to reduce your stress levels and lead a carefree life, which would reduce the risk of biting these things. If you are under any depression, i would advise you to visit a psychiatrist and get it treated and check up. Hope this was useful. Thanks and regards for a very happy life. </s>