Answer first
Good SMP aftercare comes down to four things: keep the scalp clean and dry early on, avoid sweat, sun and swimming until healed, never pick flakes, and protect the scalp from sun long term. Always follow the sheet NPM gives you.
Checklist: week one
No scratching, no saunas or swimming, no heavy gym sessions, clean pillowcase, and wash only when NPM says so.
Checklist: week two
Gentle washing, mild unscented products, moisturiser if advised, and return to exercise gradually.
Long term
Hat or sunscreen outdoors, gentle shampoo, and a touch-up when fading becomes noticeable.
Questions
Can I use my normal shampoo?
After healing, a mild shampoo is fine.
Who do I ask if something looks wrong?
Message NPM with a photo.