Lava Release: Lava Sting

The user molds chakra in his stomach expels a tiny short of lava, not bigger than a marble, to cause pain or discomfort, usually too low-powered to be destructive. It usually leaves a little burn of the size of a sting.

Trivia

 * Because is almost harmless and easy to perform, this is frequently the jutsu that determinates whether a Terumī is able to use Lava Release or not.

Reference
The info in this article belongs Misfitts, you are not allowed to use it in any form.