Thumb sucking is normal for babies, and may be their own way of soothing their feelings. However, this habit can cause problems if continued at an age when permanent teeth are growing (or have already erupted from under the gum line). Here are the negative side effects of thumb sucking:
Development of an overbite
Thumb sucking can cause the upper teeth to be pushed outward, causing an overbite.
Deformities on the roof of the mouth
The roof of the mouth may become deformed with forceful and long-term thumb sucking.
Speech problems
Problems with speech may result when the thumb sucking negatively affects the teeth alignment.
Spread of germs
Constant sucking of the thumb will increase the risk of germs spreading, especially to other children in a school setting.
Risk of being bullied or teased
A school-age child who still does thumb sucking will be more susceptible to teasing and to being bullied by other children.
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