Reiki, pranic healing, if done properly can be helpful temporarily by opening the subtle channels for the flow of prana. If the organ is sick due to the poor flow of pranic currents then it may temporarily help. But the causes of illness is an inner disharmony, an imbalance that is deeper than the vital body. Hence Reiki is usually not enough unless the problem was of a minor nature. Besides it can itself create other imbalances and the therapist may end up unwittingly taking in some of the contents of the patient’s consciousness due to close vital interchange. Hence for those pursuing a true spiritual life it is not something that can be freely recommended.
The better way to heal these things is by opening oneself to the higher consciousness beyond the mind by concentrating on the Divine Presence above the head and calling in Peace, Light etc with or without the help of an imagery.
Affectionately,
Alok Da