Don't let the hydrangeas fool you. The man they call 'Diesel' takes his tattoos and love of baseball seriously.

Conventions like this, although commonplace in most industries, are relatively new for tattooing. For St. John’s, this was the 9th annual tattoo convention, organized by Trouble Bound Studio.

When Sydney Smith of Syzygy Precision Tattooing in Scottsdale, Ariz., began sharing her microscopic tattoos on TikTok, they ...