Uhh finding something to do? XD generally biting your cheek is a sign of boredom (i think), so maybe try and occupy yourself with something? XD
i do it too i end up with lumps on the inside of my cheek from biting too much ;-; generally i do it when i feel like my mouth is dry XD idk hwo to stop it tho, rip ;-;
Yeah but that's bad as well ;-; Also Viper, use lipbalm or something, if you want to stop doing that.