BEST CHILD DENTIST IN ARUMBAKKAM! Thumb sucking is often a subconscious response to stress or boredom and most children stop the habit by their third birthday. It’s a normal part of their development and doesn’t usually indicate a physiological issue. However, if it continues, there can be lasting effects, such as: Open bite Overbite Speech difficulties Skin problems Social pressures Often thumb sucking is so habitual he or she may not be aware. Simply reminding your child of his or her behavior may be enough to overcome the habit, however, a more deliberate approach may be necessary. Sometimes it helps to hear a fresh perspective. If your child’s thumb-sucking habit continues, be sure to mention your concerns on your next visit to us at Apple Dental.