people who come to our clinic have a variety of symptoms, and of course, their work also varies.
i'm a researcher, so i'll send you the microscopic data of the needles! it's true that there are images of the difference between the tips of acupuncture needles and injection needles, but i've never seen images of the tips of acupuncture needles according to the number of needles, so I decided to collaborate on an "acupuncture needle × acupuncture needle tip research" project.
the amount of stimulation is adjusted according to the patient's ①symptoms, ② age, ③ affected area, ④ skin condition, and ⑤ skeletal muscle condition. it is important to adjust the amount of stimulation in clinical cases to determine the amount of stimulation and the treatment.

these are thin needles used for cosmetic acupuncture. the wire diameter is 0.12mm...

the actual measurement is 0.111mm, which is much thinner than the label says.

0.14mm No.1 needle

the actual measurement of the wire diameter was 0.151mm.

0.18mm No.2 needle

this is the actual measurement of the wire diameter of 0.172mm.

No.3 acupuncture needle said to be 0.20mm.

this is the actual measurement of the wire diameter of 0.185mm.

finally, No. 4. this is said to be 0.23mm...

the actual measurement of the wire diameter was 0.210mm.

what we learned from this research collaboration is that the area where the acupuncture needle tip touches the skin is "less than 0.007mm" regardless of the acupuncture needle type. in other words, the temporary pain of stinging is the same regardless of the acupuncture needle used.

acupuncture needles are placed in a tube like this, and by tapping the tip of the tube, a few millimeters of the tip enter the skin. if the needles are inserted all the way to the root, there will be a difference in stimulation between thin and thick part of needles, so the therapist must have the skill to insert just a few millimeters of the protruding part.
furthermore, when the acupuncture tube hits the skin, it leads to ambient pressure when the needles are inserted. in addition, we apply a large amount of ambient pressure around the area with a "push hand". in our clinic, we train the patient to tense the skin and insert the needles instantaneously with an awareness of how the skin runs, so the pain is less noticeable.