Thumb of finger sucking is perfectly normal behavior for young children. It can provide comfort to a child who may feel bored or restless or who is hungry. It’s a habit most children will grow out of by age three or so and is generally not a problem in children age four or younger.
Children who continue with thumb or finger sucking after this age are more likely to develop dental problems and it could potentially affect their speech. Get to know more about thumb sucking glove via reading online.
This is because prolonged thumb sucking affects the arrangement of the teeth, increasing the risk of malocclusion and it can affect the development of their jaws.
When a child does not suck their thumbs or fingers, it can push the upper front teeth to the outside, while the lower front teeth can be pushed into which the thumb rest on them. Action finger sucking can also cause changes to the upper jaw, pulling it forward and extend it so that it becomes narrower.
It also can cause speech problems and children who suck their thumb or fingers may have trouble saying Ts and Ds they are or will be a little slurred. If your child is still sucking their thumb or finger beyond the age of four then it's worth mentioning this to the dentist.
Some parents find it useful to give their kid gloves or gloves to remind them to not suck their thumbs, but obviously it does not depend on the time of year.