What % of Lidocaine is used for SMP?

Numbing creams do not work on thick scalp skin. You should ask your doctor about anesthesia as each doctor may have their own recommendations. 

PRP treatments are ok after SMP, I would wait 2 weeks however, just to give enough time for the pigment to settle in and for your scalp to fully rest.  I would avoid the dermapen, It may cause inflammation to the scalp and affect your SMP results. 

Scalp pigmentation or any other name it goes by is using inks or pigments applied to the skin. Unlike traditional art tattoos coloured pigments are not used but instead a black tone in varying degrees of deepness. The skin characteristics and sun will certainly have an affect on how long the...