纹发下针深度（0.5-1mm左右）是在表皮层，与发根（发根最深的部分毛距离头皮约为3-7mm）还有一定距离，不会伤及毛囊，色素本身和发根没有接触可能，所以纹发不会影响自身毛发生长。并且经过针刺刺激皮肤，有可能会让头皮改善出油过多现象，使头皮更清爽,该结论已经过多位客户证实。
Does smp damage hair follicles? Will it affect hair regeneration?
The depth of the smp needle (about 0.5-1mm) is in the epidermis, there is a certain distance from the hair root (the deepest part of the hair root dermal papilla is about 3-7mm), there is no damage to the hair follicle, there is no contact between the pigment itself and the hair root. So tattoos don't affect hair growth. And after acupuncture stimulation of the skin, the scalp may improve the phenomenon of excessive oil, so that the scalp more relaxed, this conclusion has been confirmed by many customers.