During early childhood, the children were entertained when they have their favorite blanket, teddy bears, etc. Similarly during their sleep time was entertaining suck their thumbs.
Children suck their thumbs when they are bored, tired, or in need of comfort. Thumb-sucking children go to bed early and did not have trouble sleeping. It has been found that the percentage of infants who have a habit of thumb sucking them varies between 75% and 95%. You can buy a thumb sucking guard in order to avoid thumb-sucking habit by visiting this site at https://www.amazon.ca/Stop-Thumb-Sucking-Ages-2-7/dp/B00VQU2DZS.
Normal behavior of Thumb-Sucking
A large number of children start sucking their thumb or fingers at a very young age. Even some of the kids started when they were in the womb. Sucking is a natural reflex baby and therefore finds comfort in sucking. Children feel safe and satisfied with thumb sucking, pacifier, finger, or another object. Many children suck their thumbs while sleeping because it gives them a sense of relaxation. Mother-sucking behavior may not cause major problems for their milk teeth.
Caused problems
Thumb-sucking child may get – buck teeth, open bite, crossbite, and crowding of teeth. It is not necessary that the habit of thumb sucking causes tooth movements in all cases. Changes bites can cause problems in chewing, swallowing, and speaking. Thumb-sucking child has a tendency to pull away when they suck their thumbs. This behavior can interfere with their ability to learn as well as their participation in all activities.