Hi, I am Dr.Prashanth Marka from Hyderabad. I will try my best to help you. Based on your answer it can be "Linea Alba" a horizontal streak on the inner surface of the cheek, level with the biting plane. It usually extends from the corner to the back teeth and can extend to the inner lip mucosa and corners of the mouth. Usually it appears on both sides. It's not a cancer.
Next Steps
It is INFORMATION only, not a substitute for doctor's visit.
Health Tips
Visit dentist for more help