Reiki has had a positive affect on all forms of illness and negative conditions. This includes minor things like head or stomach aches, bee stings, colds, flu, tension and anxiety as well as serious illness like heart disease, cancer, leukemia, etc. The side effects of regular medical treatments have also been reduced or eliminated. This includes the negative effects of chemotherapy, postoperative pain and depression as well as improving the healing rate and reducing the time needed to stay in the hospital.

Reiki always helps and in some cases people have experienced complete healing which have been confirmed by medical tests before and after the Reiki treatments. However, while some have experienced miracles, they cannot be guaranteed.