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buccinator
try to not keep biting it
A green cheek conure can be taught to refrain from biting by removing the bird and placing them back in their cage with a cover on. They dislike the isolation. The bird should never be allowed to be higher than the human.
Yes, my dentist can always tell that I bite my cheek because it leaves behind sores or scars of some sort.
No, definatly not.
death
Maybe its a ghost a past love one that kissed you on the cheek.
cheek and mandable
gavity
All kinds of self-harm is unhealthy. If it's just a nervous tic that doesn't do any damage, then it's no big deal.
Not brushing your teeth
my upper lip twitches when i after i smirk so......................................................................