During an in-person or distance Reiki session you may feel sensations in your body like temperature changes, tingling, an electric charge, nausea, or nothing. If you don't feel anything, don't worry, the energy is still flowing! Most clients fall asleep or get into a deep meditative state during a session, allowing your energetic body to become saturated with the Reiki energy.
With consistent use you may see physical benefits as well, however Reiki should never replace the role of a medical doctor or treatment. The energy may shift in your body for up to 72 hours so it will be important to continue to stay hydrated and for you to be gentle with yourself.