Nano microneedle hair growth can provide the nutrients needed for hair growth, improve the survival environment of the hair follicle, etc., generally as long as the hair follicle did not die hair growth is effective. Nano microneedle hair growth, is the minoxidil and other drugs and other nutrients injected into the hair follicle tissue, through the scalp of mechanical stimulation and chemical stimulation, making the region’s blood flow increase, to create the follicle repair and survival of favorable environment, so generally speaking as long as the hair follicle is not completely dead, there is a certain effect of hair growth. If patients want to do nano-micro-needling for hair regrowth, it is recommended to go to a regular hospital to improve the relevant examination before doing so. In the process of treatment or after the treatment, pay attention to improve the lifestyle, light diet, to ensure adequate nutrition, and at the same time to observe the growth of hair, if there is no effect or the emergence of other abnormalities need to consult a doctor in a timely manner.