Biting lips or tongue
More common in children, biting the lips or tongue is a bad habit. Biting the lips will not only deform the lips and teeth and affect the appearance, but also affect the chewing effect of the teeth due to the deformation of the upper and lower jaws. Biting the tongue, biting the lips, or biting the inside of the cheeks is a chronic irritation, which can easily cause various oral mucosal disorders such as ulcers, white spots in the mouth, and tongue pain.
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