Can I continue to use acne medication on my scalp following SMP?

There is no issue with dying your hair after Scalp MicroPigmentation.  If you are concerned it is best to ask your doctor.

Scalp MicroPigmentation SMP risk is similar to the risk of having a tattoo.  The ingredients are variable depending on the clinic.  

If you want to know why your SMP turned blue, the first person to ask would be the clinic.  Otherwise it would be almost impossible to tell since your clinic is the only source of treatment.

Shaving your head should not make your SMP fade or fade any faster.  SMP is like a tattoo.  It is under your skin.

Scalp Micropigmentation SMP can darken the bare scalp but if you lose more hair or shave your head it may not look even.

You can use clippers the next day after SMP. However it is always a good idea to check with your doctor.