Mature or adult "thumb guards" are specialized covers used to manage body-focused repetitive behaviors (BFRBs).
In broader reports, "covering with the thumb" is used as a metaphorical or literal safety metric: mature thubs
: For severe injuries in mature adults, modern surgical reports detail the use of artificial dermis to cover complex skin and soft tissue defects. This material supports rapid tissue growth and functional recovery of the interphalangeal joint. Safety and Wellness "Rules of Thumb" Mature or adult "thumb guards" are specialized covers