Reiki practice may help with a variety of physical and emotional problems, including insomnia, stress, depression, anxiety, and pain.
For example, research suggests that Reiki may lower anxiety, stress, and pain in people undergoing surgery. In a study published in 2017 of patients undergoing knee replacement surgery, researchers separated 46 patients into three groups: One group received three or four 30-minute Reiki treatments throughout their hospital stay; a second group received the same number of placebo (sham) Reiki sessions; and a third group received neither Reiki nor sham Reiki. Every group also received standard medical care. Researchers found that only those who received Reiki saw significant reductions in pain, blood pressure, breathing rate, and anxiety pre- and post-surgery.
Reiki may also improve mood and sleep: A study published in Evidence-Based Complementary and Alternative Medicine found that college students who received six 30-minute Reiki sessions reported greater improvements in stress, depression, anxiety, and sleep.
Other research suggests that Reiki and other forms of energy therapy may help patients with cancer improve pain control and anxiety levels.