People describe different experiences around an attunement, and the experience alone cannot establish its cause. Some may report feeling tired, emotional, unsettled, headachy or feverish afterward; these are not proof of detox, healing, an energy shift or a failed attunement. The U.S. National Center for Complementary and Integrative Health says Reiki has not been clearly shown effective for health-related purposes and finds no scientific evidence for the proposed energy field.
If you feel unwell, distressed, confused, or notice a new or worsening symptom, pause the practice. Do not try to push through it or interpret it as a necessary cleansing process. Seek appropriate medical or mental-health advice, especially if the symptom is severe, persistent or worrying. Ordinary rest or water may be welcome if you want them, but neither is a detox treatment. An attunement is optional; you can decline, postpone, or stop the ceremony at any point.
Afterward, you may choose a quiet moment, time outdoors, or another personal practice. These are preferences, not requirements or substitutes for care.
Related topic: Karuna Ki, Chanting and toning, Karuna Ki scanning, Four Karuna Ki Do meditations, Level one attunement.