During a reiki session, you should feel relaxed. Some fall into a controlled breathing rhythm, while others sometimes fall asleep. Every experience is different but there is absolutely NO side effects. This is a non-invasive form of healing with ZERO contraindications. Reiki can also be done as often as you wish. The Reiki Practitioner is here to make this most comfortable for you, so be sure to discuss any complaints / issues you may have.