Reiki is easily learned and practiced as self-care by anyone who is interested, regardless of the person's age or state of health. Children can learn to practice, as can the elderly and the infirm. No special background or credentials are needed to receive training.
Reiki is not an alternative treatment for medical issues but a complementary therapy that may help support healing and increase a feeling of well-being for some people. It is always best to discuss any complementary therapies with a doctor before trying them.