Hi Janine.. it might depend on the reason you are getting headaches… is there an injury involved? or allergies or sinus issues? we could certainly do one session and see how it makes you feel… I have had clients in the past that experience fairly quick success, and others that needed a few sessions. I have one client who only ever gets me to send her reiki to alleviate migraines when they crop up.
I’m sorry I couldn’t be more definitive but usually if the reiki is going to help, you should be able to feel something after the session or the next day. Please let me know if you have any other questions. Kim