It's nonsurgical - the threads, made from suturing material, are inserted via a cannula [a hollow needle] into the face, without risk of the bulkiness of fillers.

The suggestion of a hollow needle seems somewhat unlikely.

After that, the piercer puts the jewel in the hollow needle and pushes the needle through until the jewel enters into the lobe.

They are developing clusters of hollow needles that are so fine patients won't feel them piercing their skin.

As the stems and needles penetrated the victim, venom would flow through the hollow needles and into the puncture wound.