Is it okay to wash my hair or sweat after an SMP scalp tattoo?

The parting area on the crown of my head looks sparse, so I am interested in SMP scalp tattooing.

I have a lot of body heat, so my scalp sweats easily.

I am wondering if the pigment will fade or wash off when I shampoo after the procedure.

I would also appreciate it if you could let me know the most important precautions for initial post-procedure care.