Hi Dear, Welcome to HCM. UNDERSTANDING YOUR CONCERN. Brief answer - Oral Dermatophagia Detailed answer - As per your query you have habit of biting lips, cheeks which are signs of a condition called oral dermatophagia in which person because of unknown anxiety and stress keeps on biting its lips, cheeks. This will cause continued ulceration and soreness in oral cavity and over very long term this can start showing premalignant symptoms. It can cause symptoms of jaw sagginess as well. I would suggest you to avoid this habit which is although not under your control. what you can d is take small amount of insta morph moldable plastic and make tooth like shape of that and keep it on lower anterior tooth, whenever you will start biting its broad edges will come in between and will give you a reminder. Remove this while eating food. Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari