If you see yourself or something else gnawing in your dream, it could symbolize insecurity or self-doubt. This could be because you are feeling particularly uncertain or unsure of yourself in life, or it could symbolize your tendency to doubt your own abilities or worth. For example, if you dream of gnawing on your own fingers or nails, it could symbolize your feeling anxious or uncertain about something.
Gnawing can also symbolize hunger or desire, suggesting that you are feeling particularly hungry or that you are craving something in your waking life. This could be a literal desire for food, or it could symbolize a desire for something else, such as love, success, or fulfillment. For example, if you dream of gnawing on a bone or other food item, it could symbolize your feeling hungry or your craving for something.
On the other hand, gnawing can also symbolize frustration or anger, suggesting that you are feeling particularly frustrated or annoyed. This could be because you are experiencing a situation or relationship that is causing you frustration, or it could symbolize your tendency to get easily annoyed or angry. For example, if you dream of gnawing on something out of frustration, it could symbolize your feeling like you are not being heard or that you are being held back.