Answer first
After a scalp-care session, follow the aftercare your therapist gives you. In general: avoid very hot water, heavy sweating and harsh products for a day or so, do not scratch, and message us if you notice unusual redness or discomfort.
Do
Drink water, wear a clean cap or tudung, use a mild shampoo at your next wash and keep the photos you took.
Don't
Do not scrub, bleach or colour straight after a session unless your therapist says it is fine.
Questions
Can I pray and do wudhu after?
Yes.
When can I colour my hair?
Ask your therapist; it depends on the session.