These 3 tags seem to be used for a lot of the same images barbell_piercing, industrial_piercing and ear_bar and I can't tell if there's enough of a difference to warrant all 3 existing.
Barbell and industrial are already linked, but are they different enough visually to need 2 tags? Or could just 1 cover both instances?
Ear_bar is probably the most intuitive tag to describe this stile of piercing, for anyone not familiar with the terminology, but the tag is also filled with a lot of earclips.