: For physical activity, specialized guards like the ThumbPro are used in sports like baseball to protect the thumb from impact during play.
: These devices act as a physical deterrent for adult thumb sucking, skin picking (dermatillomania), nail biting, or hair pulling (trichotillomania). mature thubs
: The National Park Service promotes the "Rule of Thumb" for viewing wildlife like elk; if you cannot completely cover the animal with your outstretched thumb, you are too close. : For physical activity, specialized guards like the
In broader reports, "covering with the thumb" is used as a metaphorical or literal safety metric: : For physical activity
Mature or adult "thumb guards" are specialized covers used to manage body-focused repetitive behaviors (BFRBs).