When a child sucks a pacifier or their thumb, it’s not necessarily a bad thing. After all, these are great coping mechanisms for infants to comfort themselves. Once a child reaches a certain age, however, problems begin to arise as their oral cavity is developing and teeth are growing in. During Children’s Dental Health Month, keep reading to learn from your children’s dentist in Mission Viejo about how thumb-sucking can affect your child and what you can do to help them stop.