Thumb sucking and pacifiers: when to worry
30 August 2026 · 4 min read
Sucking is normal in babies. After the permanent teeth arrive, the maths changes.
When habits become a problem
Most children stop spontaneously between two and four years. If sucking continues past age four, or beyond the arrival of permanent front teeth, it can create an open bite, protruding upper teeth and a narrowed upper jaw.
Intensity matters more than frequency
A child who sucks vigorously for short periods can cause more change than one who rests a thumb passively in the mouth. Nighttime sucking that lasts for hours has the greatest effect.
Stopping gently
Shame never works. Reward charts, identifying triggers such as tiredness or boredom, a soft glove or sleeve at night, and myofunctional exercises to establish a new resting tongue posture are far more effective.
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