The Usui System for self, others, animals and situations. Reiki is a form of natural therapy using gentle touch. It is a simple and practical way to help us use more of (and connect more deeply with) our own source and essence. Reiki can be used as a tool for personal growth and as a regular spiritual practice. You will generally feel a pleasant sensation of warmth, or a gentle tingling in the area being treated. As the energy comes into balance, stress and tension is released and there is a deep sense of relaxation and well being. Reiki compliments most forms of treatment and medication.