Healing energy is a universal energy which surrounds us all. It is channelled through the hands of the healer to the individual wishing to receive the healing.
It is not necessary to have any particular belief system, but an open and receptive mind is desirable as it is the patient who heals himself with the healer simply acting as a channel so that the healing can take place.
You are required to do nothing other than to sit and relax while the healer places his/her hands on or near your body. Each person is unique and, therefore, will respond to the healing in their own way. The energy may be experienced as warmth or coolness resulting in relaxed and peaceful state of mind.