A teething and thumb sucking device that is worn on a hand of an adult is provided. The device includes an elongate tubular body portion and a flare portion. The body portion includes a proximal open end configured to receive a thumb of the adult hand and a distal closed end. The body portion decreases in diameter from the proximal open end to the distal closed end. The flare portion is disposed at the proximal open end of the body portion and extends axially therefrom.
