thumb sucking

The habit of putting a thumb in one's mouth and sucking it in rhythm. Done by babies as a reflex, the same one responsible for breastfeeding.

Thumb sucking usually stops by the age of four, although some children may continue it as a habit.

Examples

See also

• pacifier
• biting own thumb
• licking finger
• finger in own mouth
• thumb to mouth

External links

• Wikipedia: Thumb sucking

The following tags are aliased to this tag: thumbsucking (learn more).