Why Do Kids Suck Their Thumb? Understanding the Habit

why do kids suck their thumbs

Babies and toddlers have a natural tendency to suck their thumb, and it usually begins in the womb. While many parents are concerned about this habit, it is actually quite common and normal. In fact, it is estimated that up to 75% of newborns will suck their thumb or fingers at some point. But why do kids suck their thumb? Is it harmful? How can you help break the habit? We’ll answer the question of why kids suck their thumb and more in this blog post.

Comfort and Security 

One of the main reasons why children suck their thumb is for comfort and security. To them, the sensation of having something in their mouth feels relaxing and soothing. It can also help children feel more secure when they are feeling anxious or stressed. This habit is particularly common during the first few years of life when children are still developing a sense of security and comfort.

Soothing Reflex

 Another reason why kids suck their thumb is due to the soothing reflex. Babies have a natural reflex to suck, which is why they are able to breastfeed or drink from a bottle. Thumb sucking is an extension of this reflex, and it can help calm and soothe babies when they are hungry or upset. As children grow older, this reflex may fade but the habit can persist.

Boredom and Redirection

 Some children may also suck their thumb out of boredom or as a form of redirection. This may happen during quiet time or when they are transitioning from one activity to another. In these cases, it may be helpful to redirect your child’s attention to a new activity or provide them with a toy or game to occupy their hands.

Dental and Speech Issues

 While thumb sucking may be a harmless habit, it can lead to dental and speech issues if it persists for too long. Prolonged thumb sucking can cause misalignment of the teeth, which can lead to an overbite or underbite. It can also affect the development of the roof of the mouth, leading to speech issues. It is important to take steps to break the habit if it is interfering with your child’s oral development.

Breaking the Habit 

Breaking the habit of thumb sucking can be a challenging process, but it is important for your child’s oral health. There are a number of strategies you can try, including positive reinforcement, distraction, and substituting the thumb for a pacifier or other object. It is important to avoid punishment or shaming your child for sucking their thumb, as this can make the habit worse.


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