Sydney Smith of Syzygy Precision Tattooing went viral on TikTok after sharing her client getting micro heart tattoos. She tells PEOPLE that the ink is a "popular add-on" service.

Sydney Smith of Syzygy Precision Tattooing in Scottsdale is famous for her itty-bitty tattoos. Here's why people love them so ...

A proof-of-concept electronic heart tattoo relies on graphene to act as an ultrathin, flexible pacemaker. In rats, it treated an irregular heartbeat.

After five years, Heart Tattoo shop in Sioux Falls has relocated to somewhere a little more permanent. The 4,100-square-foot, two-story tattoo parlor, opened its doors at its new address earlier ...