In clinical practice, the depth of acupuncture should be just right, and the needle body should be slightly exposed on the skin. If you want to penetrate 0.5 inch, you can choose 1.0 inch needle; If you want to penetrate 1.0 inch, you can choose 1.5 ~ 2.0 inch needle.

Male, strong, obese and with deep lesions, you can choose a slightly thicker and longer needle. On the contrary, if women are weak and thin, and the lesions are shallow, they should choose shorter and thinner needles.

As for the selection of needles according to the specific parts of acupoints, they are generally acupoints with thin skin and less flesh and shallow acupuncture. The needles should be short and the needle body should be thin; For acupoints with thick skin and fleshy skin and deep acupuncture, you should choose a slightly longer and thicker needle.

Generally, the needles used in hospitals are 0.5 inch (for head, face and superficial skin), 1 inch (for places with less muscle), 1.5 inch (for most acupoints), 2 inch (for places with more muscle) and 3 inch (for places with more muscle fat).

You can learn acupoint anatomy. Acupuncture effect is not as deep as possible, but safety should be considered. Many ancient documents record that the acupuncture depth is even 0. 1 inch, and it does not sting the skin.