Promotes Hair Growth: Microneedles can open tiny channels in the skin in a short time, effectively penetrate the skin to absorb nutrients, penetrate deep into hair follicles, activate hair and promote new hair growth. Safe and Painless: Thanks to the fine needle tip of 1mm, the scar roller can minimize skin damage and promote the absorption of active ingredients through the skin, suitable for home use. Skin Improvement: When using a dermaroller, use it with your favorite cream, moisturizer or serum to stimulate skin receptors for better penetration and absorption. Application: Before using the derma roller, disinfect before applying your favorite skin care products, roll about 4-5 times vertically, horizontally and diagonally over the treatment area, the derma roller can be used on all areas of the face ; neck and scalp, it is recommended to use it every 7 to 10 days. Function: Suitable for skin care, not easy to break and fold, effectively improve various skin problems, microneedle roller can shrink pores, tighten and restore skin vitality, lighten pigment spots, repair scars acne, etc.