One would assume inserting a needle into the skin would be painful since most of us can relate to being stuck with a pin or having a hypodermic injection. However, four Acupuncture needles can easily be inserted into the hollow tube of a hypodermic needle. Because of the extreme slenderness of the needle, most people compare the sensations to "less than a mosquito bite." A phenomena referred to as "CHI" occurs when the energy is contacted. This sensation is felt as a mild to moderate heaviness or tingling.
Needles obviously have their place in clinical practice. However, many physicians certified in Acupuncture and licensed Acupuncturists are employing electronic and laser stimulation to the Acupoint with equal effectiveness. Both of these procedures are painless and are quickly becoming standard worldwide.
The tapping needle "teishein: is not really a needle as it does not pierce the skin. It produces a mild to moderate sensation. Compare it to taping a ball point pen on the skin. This form of stimulation has been used successfully for centuries.