高频电子表针原理是利用电流产生高压电火花来燃烧皮肤，使其脱水炭化，让皮肤细胞死亡、结痂、脱落把颜色带走(与扫班机原理相同)，洗浅层颜色(不超过0.2?)不留疤，因为表皮有横向生长的功能，但深层的颜色很难洗掉，而且燃烧过的深层皮肤会留下一层叫做“半炭化硬结层组织”(就像烧了一角的纸会留下黄迹一样的界面)，它影响深层组织向上生长，所以往深处洗一定会留疤。
The principle of high-frequency electronic watch needle is to burn the skin with high-voltage electric spark generated by electric current, dehydrate and carbonize the skin, let the skin cells die, scab and fall off to take away the color (the same as the principle of sweeping the plane), wash the light layer color (no more than 0.2?) without scar, because the skin has the function of lateral growth, but the deep layer color is difficult to wash off, and the burned deep layer skin will leave a layer called "Semi carbonized hard layer tissue" (like the yellow mark left by burning a corner of paper), it affects the growth of deep tissue, so deep washing will leave scars.