Scalp micropigmentation (SMP) is a cosmetic treatment for thinning hair or hair loss. A provider uses thin, small needles to deposit tiny dots of pigment on the scalp. These dots give the appearance of thicker hair. Scalp micropigmentation pigments are cosmetic-grade, permanent inks. When your provider performs scalp micropigmentation, it can hide thinning areas on your scalp as well as birthmarks or scars. The treatment can also give the illusion of having shaved hair or a “buzz cut” on people who are bald.