“You may experience the energy in the form of sensations like heat, tingling or pulsing where the Reiki practitioner has placed their hands,” says Victoria Bodner (Reiki Master, LMT) . “Sometimes, people feel sensations moving throughout the body, while other people do not perceive any change at all.”

Most people feel very relaxed and peaceful during reiki treatment, and many fall asleep during the process.

https://health.clevelandclinic.org/reiki/