In childhood, your children will feel comfortable when they have a favorite blanket, teddy bear, etc. Sucking the thumbs while they sleep is also comfortable. Some babies have more of a desire to suck their thumbs than others.
Children suck their thumbs when they are tired, bored, or need comfort but if the child continues this habit then it becomes a big problem which is why it needs to be stopped. To know more about best thumb sucking prevention visit https://www.amazon.co.uk/Age-2-7-Stop-Thumb-Sucking/dp/B00VQU2DZ.
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Children who suck thumbs might develop buck teeth, open bites, crossbites, and groups of teeth. It is not necessary for the habit of thumb sucking to cause the teeth to move in all cases. Changes to the bite can cause problems in swallowing, chewing, and speaking.
Children who suck on their thumbs tend to pull back themselves when they suck on their thumbs. This behavior can affect learning ability and participation in all activities.
1)Praise the child when they stop sucking their thumb and avoid punishing the child for doing so. Be positive and supportive.
2)When a child feels insecure or needs comfort, they will start sucking their thumb. Therefore, you need to get rid of the causes that cause the fear and make the child feel comfortable.
3) Observe the time when the child tends to suck and distract them at those times.
4)Finally, you can try wrapping their thumbs or putting socks in their hands, or applying for a bitter medicine on their thumbs/fingers.