There are many kinds of acupuncture needles, filiform needle is one of them, and filiform needle is a tool for curing diseases. It should be checked before use, so as not to affect the injection and treatment effect. During the examination, attention should be paid to:

The needle tip should be straight and not biased, round but not blunt, hairless hook, high finish, with a round point, like a "pine needle", so that the needle resistance is small and not blunt; The needle body should be smooth and straight, round and uniform, tough and elastic; The needle root should be firm, no erosion, scars.

The wire of the needle handle should be wound evenly, firmly and not loose or broken. The length and thickness of the needle handle should be moderate to facilitate holding the needle.