Babies sucking and chewing on their hands is a common developmental behavior that often begins in early infancy. This habit can stem from curiosity, hunger, teething, or the need for comfort. While it may raise questions for parents, it is generally considered a normal and expected part of growth. (Source: Parents, Why Babies Suck and Chew on Their Hands, By Chaunie Brusie, RN, BSN, Medically reviewed by Lyndsey Garbi, MD, Updated on April 8, 2026, https://www.parents.com/baby/development/why-do-babies-chew-on-their-hands/ ).
Toronto Kids Dental shares, “Hand-to-mouth behavior is one of the earliest ways infants begin interacting with the world around them. From a kids’ oral care perspective, this stage is not harmful but rather foundational. It introduces stimulation to the gums and oral tissues, which plays a subtle role in development. Even before teeth appear, caring for kids’ teeth begins with maintaining a clean oral environment and being mindful of what enters the mouth.”
Your Baby Has “Found” Their Hands
As babies grow, they begin to notice and control their hands. This discovery often leads to sucking or chewing simply because it’s new and engaging.
Toronto Kids Dental comments, “When babies discover their hands, they are developing coordination and sensory awareness. This stage supports oral and facial muscle development, which later contributes to chewing and speech. There is no negative impact on oral health at this point. In fact, a children’s dentist would recognize this as a healthy milestone, while also encouraging early habits that support kids’ oral care, such as gently cleaning the gums.”
Safety Tip
Since babies frequently place their hands in their mouths, cleanliness becomes important to reduce exposure to germs. At the same time, this stage often coincides with growing motor skills, as babies learn to bring their hands to their mouths and begin grasping objects within reach.
Toronto Kids Dental notes, “At this stage, oral health and overall hygiene are closely connected. Babies are constantly introducing bacteria into their mouths through their hands, which makes cleanliness essential. While this doesn’t typically lead to dental issues early on, it reinforces that caring for kids’ teeth starts well before brushing begins. Keeping hands clean helps maintain a healthier oral environment as the mouth continues to develop.
As motor skills improve, babies gain the ability to grasp and hold objects, which naturally increases the likelihood of placing various items into their mouths. This is where safety becomes equally important. Small objects, hard surfaces, or items not designed for oral use can pose risks not only for choking but also for irritation to the gums. From a kids’ oral care perspective, offering safe, age-appropriate teething toys made from non-toxic materials can help guide this behavior in a positive way. Soft, easy-to-grip designs that are specifically intended for teething can provide comfort while supporting healthy oral exploration. A children’s dentist would emphasize that combining good hygiene with safe object selection helps protect both overall health and the developing oral cavity during this stage.”
Your Baby Is Teething
Teething can cause discomfort, leading babies to chew on their hands to relieve pressure in their gums.
Toronto Kids Dental highlights, “Teething often increases hand chewing because pressure can soothe irritated gums. This behavior itself does not harm emerging teeth, but prolonged moisture around the mouth may cause minor skin irritation. From a kids’ oral care standpoint, this is an ideal time to introduce safe teething options and begin building familiarity with oral care routines. A children’s dentist would view this as an important transition period in oral development.”
Your Baby Is Hungry
Hand sucking can also signal hunger, especially before babies develop clearer ways to communicate their needs.
Toronto Kids Dental expresses, “When hand sucking is linked to hunger, it serves as an early communication cue rather than an oral health concern. However, recognizing feeding patterns plays a role in maintaining a healthy oral environment over time. As teeth begin to emerge, feeding frequency and habits can influence oral health. This is why early awareness contributes to better long-term outcomes in caring for kids’ teeth and establishing consistent kids’ oral care routines.”
Your Baby Is Looking for Comfort
Babies often suck on their hands to self-soothe when they feel tired, overwhelmed, or unsettled.
Toronto Kids Dental mentions, “Self-soothing behaviors like hand sucking are completely natural in infancy and do not negatively affect oral health at this stage. They provide emotional regulation and comfort, which are essential for development. A children’s dentist typically becomes more attentive only if these habits persist well beyond early childhood. In infancy, this behavior is both expected and beneficial from a developmental standpoint.”
Your Baby Is Doing It Just for Fun
Sometimes babies engage in hand sucking simply because they enjoy the sensation. It can be a form of play and exploration.
Toronto Kids Dental comments, “The mouth is one of the most sensitive and exploratory parts of the body, so it’s natural for babies to use it during play. This kind of behavior supports sensory development and does not pose a serious risk to oral health in early stages. Still, introducing safe alternatives and maintaining cleanliness helps reinforce positive kids’ oral care habits as the child grows.”
Does Thumb-Sucking Cause Health Issues?
While hand sucking is normal in infancy, prolonged thumb-sucking as children grow older can begin to affect dental development, particularly alignment.
Toronto Kids Dental shares, “Thumb-sucking becomes a concern only when it continues beyond the early developmental years. Over time, it can influence how teeth align and how the jaw develops. A children’s dentist monitors the duration and intensity of the habit rather than the behavior itself in infancy. Most children naturally outgrow it, but gentle guidance is important if it persists. Consistent attention to caring for kids’ teeth helps ensure that any long-term effects are minimized.”
Sucking and chewing on hands is a natural behavior that serves multiple purposes in a baby’s development, from exploration to comfort. In most cases, it is not a cause for concern and tends to decrease as babies grow and develop new skills.
Toronto Kids Dental notes, “Understanding the reasons behind hand sucking allows caregivers to respond with confidence rather than concern. From a kids’ oral care perspective, these early habits are part of normal development and rarely harmful. They also provide an opportunity to begin thinking about caring for kids’ teeth early on, creating a strong foundation for healthy oral habits as children continue to grow.”
