What is the “wavy energy” my client is seeing around her body?

This is not abnormal per se. It is her fine tuning and her keen ability to sense things. When you go looking for trouble you will likely find it, and that is true for her as well. She is able to perceive many, many, things intuitively. If she assumes what she finds is bad, it can compound problems and make her over-concerned at times. There are many kinds of energies swirling about, all serving some useful purpose. To misattribute such an energy to something harmful is a prescription for continued self-induced suffering.