Thumb Sucking
Thumb sucking is generally natural for infants and may possibly begin in the womb. According to the American Dental Association, however, if it persists into the ages of 3 or 4, it can have a deleterious effect on the teeth and jaw as they develop. In fact, chronic thumb sucking might result in severe dental and speech difficulties. More than sixty percent of ten-year-old thumb suckers have severely misaligned teeth, according to research.
Thumb sucking can lead to speech issues such as lisping and imprecise pronunciation if it is not stopped. If the habit has been abandoned, natural tooth improvement can occur.